A and B can together complete a task in 21 days. If A alone takes 42 days to complete the task, the number of days that B would take to do the task alone is:

A and B can together complete a task in 21 days. If A alone takes 42 d

1.	A and B can together complete a task in 21 days. If A alone takes 42 days to complete the task, the number of days that B would take to do the task alone is:
A.	42
B.	63
C.	27
D.	32
Answer» B. 63

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A and B can together complete a task in 21 days. If A alone takes 42 days to complete the task, the number of days that B would take to do the task alone is:

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