1.

A certain number of men can do a work in 65 days working 6 hours a day. If the number of men are decreased by one-fourth, then for how many hours per day should they work in order to complete the work

Answer»

13



Let the number of MEN initially be X. we have M1 D1 H1= M2 D2 H2 

So, x * 65 * 6 = (3x)/4 * 40 * h2 

=> h2 = (65 * 6 * 4)/(3 * 40) = 13.



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