Question

10 Mason's can build a wall working 7 hours a day,in 12 days.In how many days can the work be completed by 14 persons working 8 hours a day?​

Answer 1

7 hr * 12 days = 84 hours

10*84 = 840 man-hrs to build the wall

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14 men * 8 hr = 112 man-hrs/day

840/112 = 7.5 days

Explanation: