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

Answer:

8.4 hours

Step-by-step explanation:

$\frac{1}{6} + \frac{1}{x} = \frac{1}{3.5}$

$3.5x + 21 = 6x$

$2.5x = 21$

$x = 8.4$

So B can complete the task in 8.4 hours.