Question

A can do in 20 days B in 15 days C in 12 days. How soon can the work be done if A is assisted by B on one day and by C on the next alternatively

Answer 1

Answer:

A, B and C can do apiece of work in 11 days, 20 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by B and C on alternate days? LCM(11,20,55) = 220. So, in every 2 days, 31+24=55 units of work gets completed