Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?

Ravi can do a piece of work in 30 days while Prakash can do it in 4

1.	Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?
A.	17 1/7 days
B.	27 1/7 days
C.	23 2/7 days
D.	16 4/11 days
Answer» B. 27 1/7 days

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Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?

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