Question 37

64 men working 8 hours a day plan to complete a piece of work in 9 days. After 5 days, they were able to complete only 40% of the work. The number of hours they should work per day so as to complete the remaining work in 4 more days is

Solution

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We know ,unit of work=M×D×H

M=number of men

H=number of hour

D=number of days.

if 64 men complete 40% of work in 5 days,

then work done=64×5×8=2560 unit.

so,40% work=2560 units.

so,60% work=2560(60/40)=3840 units.

let say, to complete the  work in 4 days they need to work for x hour per day .

So,64×4×x=3840

or, x=15.

D is correct choice.

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