X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days how long will they work together take to complete the work?

X can do a piece of work in 40 days. He works at it for 8 days and

1.	X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days how long will they work together take to complete the work?
A.	13 1/3
B.	15
C.	20
D.	56
Answer» B. 15

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X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days how long will they work together take to complete the work?

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