Question 15

A work can be completed by 18 boys in 24 days. If 6 boys leave after working for 12 days, then how many days will be needed to complete the remaining work?

Solution

18 boys can complete the work in 24 days.

=> Total work = $$18\times24=432$$ MD (mandays)

Now, 6 boys leave after working for 12 days, => Work done in these 12 days = $$18\times12=216$$ MD

Remaining work = $$432-216=216$$ MD

After 6 boys left, work done per day will be $$12$$ MD

=> Time taken = $$\frac{216}{12}=18$$ days

=> Ans - (C)

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