A and B can separately do a piece of work in 6 days and 12 days respectively. How long will they together take to do the work?
A and B can separately do a piece of work in 6 days and 12 days respectively. How long will they together take to do the work?
[A]4 days
[B]6 days
[C]9 days
[D]18 days
4 days
(A + B)’s 1 day’s work
∴ A and B together will complete the work in 4 days.
Hence option [A] is correct answer.
