Question

A man can do work in 6 hours . Find the workdone by B if A and B both together can finish the work in 3.5 hours.​

Answer 1

8.4 hours

Explanation:

`(1)/(6) + (1)/(x) = (1)/(3.5)`

`3.5x + 21 = 6x`

`2.5x = 21`

`x = 8.4`

So B can complete the task in 8.4 hours.