A can do a piece of work is 8 hours while B alone can do it in 12 hours. Both A and B working together can finish the work in time?

A can do a piece of work is 8 hours while B alone can do it in 12 hour

1.	A can do a piece of work is 8 hours while B alone can do it in 12 hours. Both A and B working together can finish the work in time?
A.	10 hours
B.	4 hours
C.	24/5 hours
D.	21/4 hours
Answer» D. 21/4 hours

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A can do a piece of work is 8 hours while B alone can do it in 12 hours. Both A and B working together can finish the work in time?

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