[" 3.A,B and C can do a piece of work in 20,30and "],[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, 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 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

If A, B, and C can do a piece of work in 15, 30, and 60 days respectively. In how many days together they will do the same work?

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?