Question
Find the L.C.M. of the following numbers using prime factorisation method :
18, 24

Answer

72

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Study the content given below and answer the questions that follow :
The total cost of cultivating a rectangular field at ₹20 per $m ^2$ is ₹2440 and the breadth of the field is 26 m.
Q.1. What is the area of the field?
(a) $1200 m^2$ (b) $1220 m^2$ (c) $1222 m^2$ (d) $1224 m^2$
Q.2. What is the length of the field?
(a) 52 m (b) 47 m (c) 45 m (d) 54 m
Q.3. What is the perimeter of the field?
(a) 172 m (b) 188 m (c) 146 m (d) 134 m
Q.4. What is the cost of fencing the field at ₹25 per m?
(a) ₹3650 (b) ₹1825 (c) ₹5475 (d) none of these
Mohit makes 8 full rounds of a rectangular field with length = 120 m and breadth = 75 m. 
John makes 10 full rounds of a square field with each side 100 in. Find who covers larger distance and by how much?
Solve: 5(x - 2)- 2(x + 2) = 3
Approximately $97.3\%$ of the water on the earth is not fit for drinking. Find:
(i) the percentage of water on the earth that is fit for drinking.
(ii) The total volume of water available in certain parts of the earth where there are $21,600\ m^3$ of drinking water.
Simplify:
$6+\frac{3}{10}-1 \frac{8}{15}$
A motorist travelled the distance between two towns, which is $65\ km,$ in $2$ hours and $10$ minutes. Find his speed in metre per minute.
A train $120 m$ long passes a railway platform $160 m$ long in $14 sec.$ How long will it take to pass another platform which is $100 m$ long?
Solve: 8x + 6 + 2x - 4 = 4x + 8
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A boy got 60 out of 80 in Hindi, 75 out of 100 in English and 65 out of 70 in Arithmetic. In which subject his percentage of marks the best? Also, find his overall percentage.