MCQ 511 Mark
Ratio is a method of comparing two quantities by
AnswerThe method of comparing two quantities (numbers, things, etc.) by dividing one quantity by the other is called a ratio.
So Answar is division
View full question & answer→MCQ 521 Mark
$14$ : If $a, b, c, d$ are in proportion, then
- A
$ab = cd$
- B
$ac = bd$
- ✓
$ad = bc$
- D
AnswerCorrect option: C. $ad = bc$
$\because a, b, c$ and $d$ are in proportion,
$\therefore$ $a : b = c : d$
$\Rightarrow ab = cd$
$\Rightarrow ad = bc$
View full question & answer→MCQ 531 Mark
In a football match the ratio of total number of players of both the teams to the number of referees is:
- A
$\frac{10}{2}$
- B
$\frac{11}{2}$
- C
$\frac{22}{2}$
- ✓
$\frac{22}{1}$
AnswerCorrect option: D. $\frac{22}{1}$
The total number of football player in$1$ team $= 11$
therefore in $2$ teams the player must bes $2 \times 11 = 22$ and refree $= 1$
$\text{Ratio}=\frac{22}{1}$
View full question & answer→MCQ 541 Mark
Ratio of $250\ ml$ to $22\ L$ is.
- ✓
$25 : 100$
- B
$8 : 1$
- C
$1 : 8$
- D
$2 : 1$
AnswerCorrect option: A. $25 : 100$
$2\ L = 2000\ ml$
Now, the ratio $250 : 2000$
$= 1 : 8$
View full question & answer→MCQ 551 Mark
In an office, the working hours are $10.30\ AM$ to $5.30\ PM$ and in between $30$ minutes are spent on lunch. Find the ratio of office hours to the time spent for lunch.
- A
$\frac{7}{30}$
- B
$\frac{1}{14}$
- ✓
$\frac{14}{1}$
- D
$\frac{30}{7}$
AnswerCorrect option: C. $\frac{14}{1}$
The offfice hours are from $10.30\ AM$ to $5.30\ PM$ hence total office
hours are $7$ hours and lunch time hours is $\frac{1}{2}$ hours
ratio of office hrs to lunch time $=\frac{7}{\frac{1}{2}}$
this gives ratio $= 14 : 1$
View full question & answer→MCQ 561 Mark
Mark $(\checkmark)$ against the correct answer in the following.
If the cost of $12$ pens is $Rs. 138$, then the cost of $14$ such pens is:
- A
$Rs. 164$
- ✓
$Rs. 161$
- C
$Rs. 118.30$
- D
$Rs. 123.50$
AnswerCorrect option: B. $Rs. 161$
Cost of $12$ pens $= Rs\ 138$
Cost of $1$ pen $=\text{Rs.}\frac{138\times14}{12}$
And cost of $14$ pens $= Rs. 161$
View full question & answer→MCQ 571 Mark
A jar contains black and white marbles. If there are ten marbles in the jar, then which of the following could $NOT$ be the ratio of black to white marbles?
- A
$9 : 1$
- B
$7 : 3$
- ✓
$1 : 10$
- D
$1 : 4$
AnswerCorrect option: C. $1 : 10$
A jar contains black and white marbles The total marble is $10$ Optn
$a.\ 9 + 1 = 10$ Optn
$b.\ 7 + 3 = 10$ Optn
$c.\ 1 + 10 = 11 ($does not satisfy the condition so that $10$ is the answer$)$ Optn
$d.\ x = 2, 2 + 8 = 10$
View full question & answer→MCQ 581 Mark
Two taps can fill a tub in $5$ minutes and $7$ minutes respectively $A$ pipe can empty it in $3$ minutes If all the three are kept open simultaneously when will the tub be full?
- A
$60$ minutes
- B
$85$ minutes
- C
$90$ minutes
- ✓
$105$ minutes
AnswerCorrect option: D. $105$ minutes
Given Two taps can fill a tub in $5$ minutes and $7$ minutes respectively $A$ pipe can empty it in $3$ minutes Then net part fill in one hours
$=\frac{1}{5}+\frac{1}{7}-\frac{1}{3}=\frac{21+15+-35}{105}=\frac{1}{105}$
Then total tank fill in $105$ minites
View full question & answer→MCQ 591 Mark
Ratio of $60$ hrs to $600$min is
- A
$3600 : 600$
- B
$1 : 6$
- ✓
$6 : 1$
- D
$5 : 1$
AnswerCorrect option: C. $6 : 1$
$60$ hrs $= 60 \times 60$ mins $= 3600$ mins
Now, the ratio
$3600 : 600$
$= 6 : 1$
View full question & answer→MCQ 601 Mark
Mark $(\checkmark)$ against the correct answer in the following.
The angles of a triangle are in the ratio $3 : 1 : 2$. The measure of the largest angle is:
- A
$30^\circ $
- B
$60^\circ$
- ✓
$90^\circ $
- D
$120^\circ$
AnswerCorrect option: C. $90^\circ $
Ratio in the angles of triangle $= 3 : 1 : 2$
Sum of angle of a triangle $= 180^\circ $
Largest angle $=\frac{180^{\circ}\times3}{3+1+2}$
$=\frac{180^{\circ}\times3}{6}$
$=90^{\circ}$
View full question & answer→MCQ 611 Mark
Mark $(\checkmark)$ against the correct answer in the following.
The 1st, 2nd and 4th terms of a proportion are $12, 21$ and $14$ respectively. Its third term is:
Answer$1$st term $= 12$
$2$nd term $= 21$
fourth term $= 14$
Let third term $= x$, then
$12 : 21 :: x : 14$
$\text{x}=\frac{12\times14}{21}=8$
View full question & answer→MCQ 621 Mark
The sum of two real numbers $x$ and $y$ is $20.$ If $xy^3$ is greatest, then the ratio $x^2 : y^2$ is $1:\lambda.$ Find the value of $\lambda$
- ✓
$\frac{1}{9}$
- B
$\frac{5}{9}$
- C
$\frac{4}{9}$
- D
$\frac{7}{9}$
AnswerCorrect option: A. $\frac{1}{9}$
We have, $x + y =20 \rightarrow$ $(1)$
Let $z=x y^3=(20-y) y^3=20 y^3-y^4$
Now for $\max$ of $z , \frac{ dz }{ dy }=0$
$\Rightarrow 60 y ^2-4 y ^3=0 \rightarrow y =15$
Therefore $x =20- y =5$
Hence $\frac{ x ^2}{ y ^2}=\frac{25}{225}=\frac{1}{9} \Rightarrow \lambda=9$
View full question & answer→MCQ 631 Mark
Mark $(\checkmark)$ against the correct answer in the following:
If $57 : x : : 51 : 85$, then the value of $x$ is:
AnswerGiven:
$57 : x :: 51 : 85$
We know:
Product of means = Product of extremes
$51\text{x} = 57 \times 85$
$\text{x}=\frac{4845}{51}=95$
View full question & answer→MCQ 641 Mark
Five litres are drawn off from a vessel full of milk and substituted by water Again five litres of the mixture are withdrawn and is replaced by water If the vessel now contains milk and water in the ratio $16 : 9$ the capacity of the vessel is.
- A
$12.5$ litres
- ✓
$25$ litres
- C
$20$ litres
- D
$15$ litres
AnswerCorrect option: B. $25$ litres
Let the capacity be $x$ lites $5$ litres of quantity is taken out every time and is
replaced with water two $\big(\frac{\text{x}-5}{\text{x}}\big)^2=\frac{16}{16+9}=\frac{16}{25}=\big(\frac{4}{5}\big)^2$
$\Rightarrow\big(\frac{\text{x}-5}{\text{x}}\big)=\frac{4}{5}$
$\Rightarrow\text{x}=25\text{ liters}$
View full question & answer→MCQ 651 Mark
Mark the correct alternative in the following:
Two numbers are in the ration $3 : 5$ and their sum is $96$. The larger number is:
AnswerLet the larger number be $x$.
Then, the smaller number be $(96 - x)$.
According to the question,
$\frac{96-\text{x}}{\text{x}}=\frac{3}{5}$
$\Rightarrow\frac{(96-\text{x})\times\text{x}\times5}{\text{x}}=\frac{3\times\text{x}\times5}{5}$
$\Rightarrow5(96-\text{x})=3\text{x}$
$\Rightarrow480-5\text{x}=3\text{x}$
$\Rightarrow3\text{x}+5\text{x}=480$
$\Rightarrow8\text{x}=480$
$\Rightarrow\frac{8\text{x}}{8}=\frac{480}{8}$
$\Rightarrow\text{x}=60$
Thus, the larger number is $60$.
Hence, the correct option is $(c)$.
View full question & answer→MCQ 661 Mark
If $2a = 3b$ then $a : b =$
- A
$1 : 3$
- ✓
$3 : 2$
- C
$2 : 3$
- D
$1 : 2$
AnswerCorrect option: B. $3 : 2$
$2\text{a}=3\text{a}\Rightarrow\frac{\text{a}}{\text{b}}=\frac{3}{2}$
View full question & answer→MCQ 671 Mark
Mark the correct alternative in the following:
If $80 : 60 = x : 12$, then $x =$
AnswerIt is given that,
$\frac{80}{60}=\frac{\text{x}}{12}$
$\Rightarrow\frac{80\div5}{60\div5}=\frac{\text{x}}{12}$
$\Rightarrow\frac{16}{12}=\frac{\text{x}}{12}$
$\Rightarrow\text{x}=16$
Hence, the correct option is $(a)$.
View full question & answer→MCQ 681 Mark
If $A : B = 2 : 3 B : C = 4 : 5, C : D = 3 : 7,$ then $A : B : C : D$ is.
- A
$2 : 3 : 4 : 7$
- ✓
$8 : 12 : 15 : 35$
- C
$24 : 36 : 45 : 105$
- D
AnswerCorrect option: B. $8 : 12 : 15 : 35$
$A : B = 2 : 3$ or $A : B = 4 \times 2 : 4 \times 3 = 8 : 12$
$B : C = 4 : 5$ or $B : C = 4 \times 3 : 5 \times 3 = 12 : 15$
$C : D = 3 : 7$ or $C : D = 3 \times 5 : 7 \times 5 = 15 : 35$
$\therefore$ $A : B : C : D = 8 : 12 : 15 : 35$
View full question & answer→MCQ 691 Mark
Mark the correct alternative in the following:
If $a = 2b$, then $a : b =$
- ✓
$2 : 1$
- B
$1 : 2$
- C
$3 : 4$
- D
$4 : 3$
AnswerCorrect option: A. $2 : 1$
$a = 2b$
$\Rightarrow\frac{\text{a}}{\text{b}}=\frac{2}{1}$
$\Rightarrow\text{a}:\text{b}=2:1$
Hence, the correct option is $(a)$.
View full question & answer→MCQ 701 Mark
Mark $(\checkmark)$ against the correct answer in the following.
$10$ boys can dig a pitch in $12$ hours. How long will $8$ boys take to do it?
- A
$9h\ 36\ min$
- ✓
$15h$
- C
$6h\ 40\ min$
- D
$13h\ 20\ min$
Answer$10$ boys dig a patch in $= 12$ hours
$1$ boy will dig it in $= 12 \times 10$ hours
And $8$ boys will digit it in $\frac{12\times10}{8}$
$=15\text{ hours}.$
View full question & answer→MCQ 711 Mark
Mark the correct alternative in the following:
If $4 : 5 : : x : 45$, then $x =$
Answer$4 : 5 : : x : 45$
$\Rightarrow\frac{4}{5}=\frac{\text{x}}{45}$
$\Rightarrow\frac{4\times45}{5}=\frac{\text{x}\times45}{45}$
$\Rightarrow\frac{4\times6}{1}=\text{x}$
$\Rightarrow\text{x}=36$
Hence, the correct option is $(c)$.
View full question & answer→MCQ 721 Mark
The ratio of boys and girls in a school is $12 : 5$. If there are $840$ girls in the school, then the number of boys is:
- A
$1190$
- B
$2380$
- C
$2856$
- ✓
$2016$
AnswerCorrect option: D. $2016$
If the number of girls in the school is 840, let the number of boys be $x$,
It is given that the ratio of boys and girls is $12 : 5$,
Therefore, we get:
$\therefore$ $12 : 5 = x : 840$
$\text{x}=\frac{12\times840}{5}=2016$
View full question & answer→MCQ 731 Mark
The ratio of three numbers is $3 : 4 : 5$ and the sum of their squares is $1250.$ The sum of the three numbers is:
AnswerLet the three numbers be $3x, 4x$ and $5x.$
Given $(3x)^2 + (4x)^2 + (5x)^2 = 1250$
$9x^2 + 16x^2 + 25x^2 = 1250$
$\Rightarrow 50x^2 = 1250$
$\Rightarrow x^2 = 25$
$\Rightarrow x = 5$
$\therefore$ The three numbers are $3 \times 5, 4 \times 5$ and $5 \times 5$
i.e., $15, 20$ and $25$
Required sum $= 15 + 20 + 25 = 60$
View full question & answer→MCQ 741 Mark
If a sphere and cube have the same surface are then the ratio of the diameter of sphere to edge of the cube is
- ✓
$\sqrt{6}:\sqrt{\pi}$
- B
$\sqrt{\pi}:\sqrt{6}$
- C
$2:1$
- D
$1:2$
AnswerCorrect option: A. $\sqrt{6}:\sqrt{\pi}$
Surface area of cube $= 6a^2$
Surface area of sphere $=\pi\text{r}^2$ As per question both are same
$4\pi\text{r}^2=6\text{a}^2\Rightarrow\frac{\text{r}^2}{\text{a}^2}=\frac{3}{2\pi}$
$\Rightarrow\frac{\text{r}^2}{\text{a}^2}=\frac{3}{2\pi}\Rightarrow\frac{\text{r}}{\text{a}}=\sqrt{\frac{3}{2\pi}}$
Then ratio of Diameter of sphere and edge of the cube $=\frac{2\sqrt{3}}{\sqrt{2\pi}}=\frac{\sqrt{6}}{\sqrt\pi}$
View full question & answer→MCQ 751 Mark
The ratio of $96\ m$ and $72\ m$ is.
- A
$3 : 4$
- ✓
$4 : 3$
- C
$2 : 1$
- D
$4 : 1$
AnswerCorrect option: B. $4 : 3$
To find the ratio of two numbers, we have to consider their fraction.
Here, the numbers are $96m$ and $72m$ then we have:
$\frac{96\text{m}}{72\text{m}}=\frac{96}{72}=\frac{4}{3}=4:3$
Hence, the ratio of $96\ m$ and $72\ m$ is $4 : 3$
View full question & answer→MCQ 761 Mark
Mark $(\checkmark)$ against the correct answer in the following.
Two numbers are in the ratio $5 : 7$ and the sum of these numbers is $252$. The larger of these number is:
Answer$\text{largest}=\frac{252\times7}{5+7}$
$=\frac{252\times7}{12}$
$=21\times7$
$=147$
View full question & answer→MCQ 771 Mark
In a class there are $50$ boys and $30$ girls. The ratio of the number of boys to the number of girls in the class is
- A
$80 : 50$
- B
$3 : 5$
- ✓
$5 : 3$
- D
AnswerCorrect option: C. $5 : 3$
Number of boys in class $=50$
Number of girls in class $=30$
Ratio of number of boys to the number of girls in the class $=50: 30=5: 3$
View full question & answer→MCQ 781 Mark
The greatest ratio among the ratios $2 : 3, 5 : 8, 75 : 121$ and $40 : 25$ is:
- A
$2 : 3$
- B
$5 : 8$
- C
$75 : 121$
- ✓
$40 : 25$
AnswerCorrect option: D. $40 : 25$
Given, ratios $2 : 3, 5 : 8, 75 :121$ and $40 : 25.$
$2 :3= \frac{2}{3} = 0.66$
$5:8 = \frac{5}{8}= 0.62$
$75:121 =\frac{75}{121}= 0.61$
$40:25 =\frac{40}{25} = 1.6$
Hence, $40 : 25$ is the greatest.
Hence, $(d)$ is the correct option.
View full question & answer→MCQ 791 Mark
Mark $(\checkmark)$ against the correct answer in the following.
If $24$ workers can build a wall in $15$ days, how many days will $8$ workers take to build a similar wall?
- A
$42$ days
- ✓
$45$ days
- C
$48$ days
- D
AnswerCorrect option: B. $45$ days
$\frac{24\times18}{8}$
$=45\text{ days}$
View full question & answer→MCQ 801 Mark
Mark $(\checkmark)$ against the correct answer in the following.
If $57 : x :: 51 : 85$ then the value of $x$ is:
Answer$\frac{57}{\text{x}}$
$=\frac{51}{85}$
$\Rightarrow\text{x}=\frac{57\times85}{51}=95$
View full question & answer→MCQ 811 Mark
Mark $(\checkmark)$ against the correct answer in the following.
If $4 : 5 :: x : 35$ then the value of $x$ is:
AnswerCorrect option is $C$. $28$
$\text { Given }$
$4: 5:: x: 35 $
$\Rightarrow \frac{4}{5}=\frac{x}{35} $
$\Rightarrow 5 x=4 \times 35 $
$\Rightarrow x=\frac{(4 \times 35)}{5}$
$\Rightarrow x=\frac{140}{5} $
$\Rightarrow x=28$
Hence, Option $(C)$ is the correct answer
View full question & answer→MCQ 821 Mark
In our country India the ratio of number of states to the number of union territories is
- A
$7 : 28$
- B
$25 : 7$
- ✓
$28 : 9$
- D
$7 : 25$
AnswerCorrect option: C. $28 : 9$
Number of states $= 29$ Number of union territories $= 9$ Ratio $29 : 9$
View full question & answer→MCQ 831 Mark
Two numbers whose sum is $64$, cannot be in the ratio?
- A
$5 : 3$
- ✓
$3 : 4$
- C
$7 : 1$
- D
$9 : 7$
AnswerCorrect option: B. $3 : 4$
For dividing $64$ into two whole numbers, the sum of the terms of the ratio must be a factor of $64.$
So, they cannot be in the ratio $3 : 4$
View full question & answer→MCQ 841 Mark
The fraction $\frac{5}{8}$ can be written in the form of ratio as:
- A
$8 : 5$
- ✓
$5 : 8$
- C
$4 : 5$
- D
AnswerCorrect option: B. $5 : 8$
Given fraction is $ \frac{5}{8}$ which can be written in form of ratio as $5 : 8$
View full question & answer→MCQ 851 Mark
If $bc : ac : ab = 1 : 2 : 3$ then find $\frac{\text{a}}{\text{bc}}:\frac{\text{b}}{\text{ca}}$
- A
$1 : 4$
- B
$3 : 4$
- C
$1 : 3$
- ✓
$4 : 1$
AnswerCorrect option: D. $4 : 1$
$bc : ac = 1 : 2$ or $ac : bc = 2 : 1$ or $a : b = 2 : 1 (1)$
$ac : ab = 2 : 3$ or $ab : ac = 3 : 2$ or $b : c = 3 : 2 (2)$
From $(1)$ and $(2), a : b = 2 \times 3 : 1 \times 3 = 6 : 3$
$\therefore a : b : c = 6 : 3 : 2$
$\therefore\frac{\text{a}}{\text{bc}}:\frac{\text{b}}{\text{ca}}=\frac{6}{3\times2}:\frac{3}{2\times6}=1:\frac{1}{4}=4:1$
View full question & answer→MCQ 861 Mark
Mark $(\checkmark)$ against the correct answer in the following:
Two numbers are in the ratio $3 : 5$ and their sum is $96.$ The larger number is:
AnswerRatio $= 3 : 5$
Let $x$ be any number such that we have:
$3\text{x} + 5\text{x} = 96$
$\Rightarrow 8\text{x} = 96$
$\Rightarrow\text{x}=\frac{96}{8}=12$
The numbers are:
$3\text{x} = 3 \times 12 = 36$
$5\text{x} = 5 \times 12 = 60$
The largest number $= 60$
View full question & answer→MCQ 871 Mark
Two ratio $384 : 480$ in its simplest form is:
- A
$3 : 5$
- B
$5 : 4$
- ✓
$4 : 5$
- D
$2 : 5$
AnswerCorrect option: C. $4 : 5$
$384 : 480 = 4 : 5$ (Dividing the denominator and numerator by $96$).
View full question & answer→MCQ 881 Mark
If $\text{a}:\text{b}=1\frac{1}{2}:2\frac{1}{4}$ and $\text{b}:\text{c}=\frac{1}{7}:\frac{1}{4}$ what is $a : b : c$?
- A
$12 : 8 : 21$
- B
$8 : 21 : 12$
- ✓
$8 : 12 : 21$
- D
$21 : 8 : 12$
AnswerCorrect option: C. $8 : 12 : 21$
$\text{A : B}=1\frac{1}{2}:2\frac{1}{4}=\frac{\frac{3}{2}}{\frac{4}{3}}=\frac{2}{3}=\frac{8}{12}$
$\text{B : C}=\frac{\frac{1}{7}}{\frac{1}{4}}=\frac{4}{7}=\frac{12}{21}$
$\text{A : B : C}=8:12:21$
View full question & answer→MCQ 891 Mark
The volume of a sphere is $8$ times that of another sphere. What is the ratio of their surface areas?
- A
$8 : 1$
- ✓
$4 : 1$
- C
$2 : 1$
- D
$4 : 3$
AnswerCorrect option: B. $4 : 1$
We know that if volume ratio of two spheres is $8 : 1$ then the ratio of their radii is $8^\frac{1}{3}:1^\frac{1}{3}=2:1$
Therefore, ratio of their surface areas $= 4n(2)2^ : 4n(1)^2 = 4 : 1$
View full question & answer→MCQ 901 Mark
The ratio of number of males to number of females in a club are $7 : 4$ If there are $84$ males in the club, the total number of members in the club are
AnswerLet the number of males $= 7x$ and
number of Females $= 4x$
Given that $7x = 8$4
$\Rightarrow x = 12$
Total number of members $= 7x + 4x = 11x$
$= 11 \times 12 = 132$
View full question & answer→MCQ 911 Mark
Mark $(\checkmark)$ against the correct answer in the following.
If $40$ men can finish a piece of work in $26$ days, how many men will be required to finish it in $20$ days?
Answer$\frac{26\times40}{20}$
$=520\text{ men}$
View full question & answer→MCQ 921 Mark
The ratio of $350g$ and $3\ kg$ is:
- A
$\frac{116}{1}$
- B
$\frac{60}{7}$
- ✓
$\frac{7}{60}$
- D
$\text{None}$
AnswerCorrect option: C. $\frac{7}{60}$
The ratio of $350g$ and $3\ kg$
first convert $3\ kg$ to $g$
we get $3g = 3000g$
$\text{ratio}=\frac{350}{3000}$
$\text{We getratio}=\frac{7}{60}$
View full question & answer→MCQ 931 Mark
Mark $(\checkmark)$ against the correct answer in the following.
Length and breadth of a rectangular field are in the ratio $5 : 4$. If the width of the field is $36m$, what is its length?
AnswerRatio in length and breadth of a rectangle $= 5 : 4$
Width $= 36m$
Length $=\frac{5}{4}\times36\text{m}$
$=45\text{m}$
View full question & answer→MCQ 941 Mark
The ratio of $x\%$ of $y$ to $y\%$ of $x$ is equal to.
View full question & answer→MCQ 951 Mark
The ratio of the length and breadth of a rectangle is $4 : 3$ The area of the rectangle is $192\ cm^2.$ The perimeter of the rectangle will be-
- A
$46\ cm$
- B
$36\ cm$
- ✓
$56\ cm$
- D
$28\ cm$
AnswerCorrect option: C. $56\ cm$
Let the length and breadth of the rectangle be $4x\ cm$ and $3x\ cm$ respectively.
$\therefore$ Area of the triangle $= 12x^2$
$= 192$
or $x^2 = 16$
or $x = 4$
$\therefore$ Length $16\ cm$ and breadth $12\ cm$
$\therefore$ Perimeter of the rectangle $= 2(16 + 12)$
$= 56\ cm$
View full question & answer→MCQ 961 Mark
Ratio of $30$ hrs to $300$ min is____
- ✓
$6 : 1$
- B
$1 : 6$
- C
$4 : 1$
- D
$900 : 300$
AnswerCorrect option: A. $6 : 1$
$30 \times 60 = 1800\ min : 300\ min$
$= 1800 : 300 = 1800 : 300$
$= 6 : 1$
View full question & answer→MCQ 971 Mark
Simplest form of the ratio $144 : 28$ is
- A
$28 : 4$
- ✓
$36 : 7$
- C
$7 : 36$
- D
$1 : 2$
AnswerCorrect option: B. $36 : 7$
$\frac{144}{4}:\frac{28}{4}\text{ HCF}=4$
View full question & answer→MCQ 981 Mark
The ratio of $75\ mL$ to $3$ lires is.
- A
$25 : 1$
- B
$40 : 1$
- ✓
$1 : 40$
- D
$3 : 200$
AnswerCorrect option: C. $1 : 40$
$75\ ml$ to $3$ litre
$= 75 : 3000$
$= 1 : 40$
View full question & answer→MCQ 991 Mark
If $57 : x = 51 : 85$, then the value of $x$ is:
AnswerConsider
$57 : x = 51 : 85$
$\Rightarrow\frac{57\times85}{51}=\text{x}$
$\Rightarrow\text{x}=95$
View full question & answer→MCQ 1001 Mark
The ratio of the heights of $A$ and $B$ is $4 : 3$ If $B$ is $1.2m$ tall, then the height of $A$ is.
AnswerCorrect option: C. $1.6m$
$\text{Height of A }=\frac{4}{3}\times\text{height of B}$
$=\frac{4}{3}\times1.2$
$=1.6\text{m}$
View full question & answer→