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If 10 men, working 7 hours a day dig a trench 147 m long, how many men working 8 hours a day will dig a trench 168 (of the same breadth and depth as the first in the same number of days) ? |
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Answer» WORKING 7 hours a DAY 147 m long TRENCH can be dug by = 10 MEN. Working 1 hour a day 147 m long trench can be dug by = 10*7 Working 1 hour a day 1 m long trench can be dug by = (10*7)/147 Working 8 hours a day 1 m long trench can be dug by = (10*7)/(147*8) Working 8 hours a day 160 m long trench can be dug by = (10*7*160)/(147*8) = 11200/1176 = 9.523 As the men cannot be in decimal or fraction, so, the answer is 10 men. |
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