A and B together can do a piece of work in 10 days. A alone can do it in 30 days. The time in which B alone can do it is :
A and B together can do a piece of work in 10 days. A alone can do it in 30 days. The time in which B alone can do it is :
[A]10
[B]12
[C]20
[D]15
15
(A+B)’s 1 day’s work =
A’s 1 day’s work =
∴ B’s 1 day’s work =
=
Hence, B, alone can complete the work in 15 days.
