Question

A does 30 percent work in 20 days he then calls in b and they together finish the remaining workin 20 days how long b alone would taketo dothe wholework

Answer 1

30=20days

100=?days=100/30×20=66.6days only A can do

now B and A can do it in 20days only A can take it for 46.6 days and B works the same work in?days =70%=26.6work

100% =? then

100×26.6/70 = 38 so B can do the work in 38 days