Question
A child is half as efficient as a man. How much time do
8 children need to build a wall that is 60% the size of the wall built by the 12 men in 15 days?Solution
Let the efficiency of each man be '2x' units/daySo, total work = 2x X 12 X 15 = '360x' unitsAnd efficiency of a child = 2x ÷ 2 = 'x' units/daySo, required time = (360x X 0.6) ÷ (8 X x) = 27 days
More Arithmetic Problem Questions
15.99% of 549.99 ÷ 11.17 = ? ÷ 20.15
74.91% of 639.95 – 599.98% of 45 + 119.987 = ?
(4.88 × 5.76)2 - ?2 = 39.89 × 19.86
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
(1800.23 ÷ 29.98) + (816.32 ÷ 23.9) + 1634.11 = ?
1449.98 ÷ 50.48 × 10.12 = ? × 2.16
36.05 × 5.02 + 12.052 = ? + 9.09 × 4.04Â
(31.9)3 + (34.021)² - (16.11)3 - (42.98)² = ?
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