Sample QuestionsChanging the subject of a formula questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Make a formula for the statement$:"$The number of diagonals$, d, $that can be drawn from one vertex of an $n$ sided polygon to all the other vertices is equal to the number of sides of the polygon less $3".$
View full solution →The arithmetic mean $M$ of the five numbers $a, b, c, d, e$ is equal to their sum divided by the number of quantities. Express it as a formula.
View full solution →The volume$ V,$ of a cone is equal to one third of $\pi $ times the cube of the radius. Find a formula for it.
View full solution →The simple interest on a sum of money is the product of the sum of money, the number of years and the rate percentage. Write the formula to find the simple interest on Rs $A$ for $T$ years at $R%$ per annum.
View full solution →The total energy $E$ possess by a body of Mass $' m\ ',$ moving with a velocity $' v\ '$ at a height $'h\ '$ is given by: $E=\frac{1}{2} m u^2+mgh$. Make $' m\ '$ the subject of formula.
View full solution →The pressure $P$ and volume $V$ of a gas are connected by the formula $PV = C ;$ where $C$ is a constant. If $P=4$ when $V=2 \frac{1}{2} ;$ find the value of $P$ when $V=4$ ?
View full solution →Make $c$ the subject of the formula $a = b(1 + ct).$ Find $c,$ when $a = 1100, b = 100$ and $t = 4.$
View full solution →Make $N$ the subject of formula $I=\frac{N G}{R+N y}$
View full solution →Make $y$ the subject of formula $W=p q+\frac{1}{2}$ wy $^2$
View full solution →Make $m$ the subject of the formula $x=\frac{m y}{14-m t}$. Find $m$, when $x=6, y=10$ and $t=3$.
View full solution →"Area $A$ oof a circular ring formed by $2$ concentric circles is equal to the product of pie and the difference of the square of the bigger radius $R$ and the square of the bigger radius $R$ and the square of the smaller radius $r.$ Express the above statement as a formula. Make $r$ the subject of the formula and find $r$, when $A = 88 sq \ cm$ and $R = 8 \ cm$.
View full solution →Make $s$ the subject of the formula $v^2 = u^2 + 2as$. Find s when $u = 3, a = 2$ and $v = 5.$
View full solution →Make $g$ the subject of the formula $v ^2= u ^2-2 gh$. Find $g$ , when $v =9.8, u =41.5$ and $h =25.4$.
View full solution →Make $h$ the subject of the formula $R=\frac{h}{2}(a-b)$. Find $h$ when $R=108, a=16$ and $b=12$.
View full solution →Make $y$ the subject of the formula $\frac{x}{ a }+\frac{y}{ b }=1$. Find $y$, when $a =2, b =8$ and $x =5$.
View full solution →Make $x$ the subject of the formula $y =\frac{1-x^2}{1+x^2}$, Find $x$, when $y =\frac{1}{2}$
View full solution →Make $h$ the subject of the formula $K=\sqrt{\frac{h g}{d^2}-a^2}$. Find $h$, when $k=-2, a=-3, d=8$ and $g=32$.
View full solution →Make $x$ the subject of the formula $a=1-\frac{2 b}{c x-b}$. Find $x$, when $a=5, b=12$ and
View full solution →Make a the subject of the formula $S=\frac{n}{2}\{2 a+(n-1) d\}$. Find $a$ when $S=50, n=10$ and $d=2$.
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