Question

A and b together can do a piece of work in 20 days b alone can do 1 of one fifth of the work in 12 days in how many days a alone can do it

Answer 1

Answer:

Let work be x

A and B do x in 20 days

b can do 1/5x in 12 days

so b can do x in 12×5=60 days

a can alone do x in=60/20=30 days