A can do in one day three times the work done by B in one day. They together finish 2/5 of the work in 9 days. The number of days by which B can do the work alone is :

A can do in one day three times the work done by B in one day. They to

1.	A can do in one day three times the work done by B in one day. They together finish 2/5 of the work in 9 days. The number of days by which B can do the work alone is :
A.	90 days
B.	120 days
C.	100 days
D.	30 days
Answer» B. 120 days

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A can do in one day three times the work done by B in one day. They together finish 2/5 of the work in 9 days. The number of days by which B can do the work alone is :

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