If A alone can do a job in 40 days then, in how many days can B alone do the job if together they can do the job in 8 days?

If A alone can do a job in 40 days then, in how many days can B alone

1.	If A alone can do a job in 40 days then, in how many days can B alone do the job if together they can do the job in 8 days?
A.	15
B.	10
C.	20
D.	25
Answer» C. 20

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If A alone can do a job in 40 days then, in how many days can B alone do the job if together they can do the job in 8 days?

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