Question

15 man can do a work in 12 days. how many days would 20 men take to complete the same work?.​

Answer 1

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.

Answer 2

men= 15 | x

days=. 12 | 20

In Direct variation:

x = 12

20. 15

(devide them)

answer-

x = 5

5

x=5×5

x=25

hope this helped you out!!