Question

If 18 men can finish a work in 15 days how many more men should be employed to
finish the work in 9 days ?​

Answer 1

Answer:

any question like this u can use shortcut:

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.