Question

Do it in Unitary Method: If 18 men can finish a piece of work in 42 days, how many more men should be added to finish the work in 36 days?

Answer 1

Answer:

10

Step-by-step explanation:

15*12= 18*X

(where X is the days taken by 18 men)

So the answer is 10 days.

But if you go by traditional unitary method:

15 men can do the job in 20 days

1 man can do the work in 20*15 days

18 men can do the work in 20*15/18

Which results into 10.

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