Mental Maths Class 5 Comparing Quantities

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

A leaky faucet wastes 20% of a 50-litre bucket every hour. How many litres of water are wasted in one hour?

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A 5 litres
B 10 litres
C 20 litres
D 25 litres

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Answer: B. 10 litres

Answer: B) 10 litres
Explanation: To find 20% mentally, first find 10% by moving the decimal one spot (10% of 50 is 5). Then double it (5 × 2 = 10).

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A leaky faucet wastes 20% of a 50-litre bucket every hour. How many litres of water are wasted in one hour?

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