Question

If A can do three/twenty
part of a work in one day, then he can finish the

whole work in days​

Answer 1

Therefore let the number of days taken to complete the whole work be x.

Therefore:

1: 1/20 :: x :20/20 ( Product of means =product of extremes)

x/20= 20/20

x=20/20*20

x=20 days

Therefore the answer = 20 days