If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work...? Mcqs

If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work...?

(A) 60

(B) 45

(C) 40

(D) None of these