A , B and C can do a piece 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?

A, B and C can do a piece of work in 20, 40 and 80 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

A, B and C can do piece ofwork in 30 days, 45 days and 90 days, respectively. A starts the work and heis assisted by B and C togetheron every third day. In how many dayswill the work be completed?

A,B and C can do a piece of work in 20,30 and 60 days respectively.In how many days can A do the work if he is assisted by B and C on every third day? a.12 days b.15 days c.16 days d.18 days

A and B can do a piece of work in 10 days, B and C in 15 days and C and A in 20 days. C alone can do the work in :