A, B and C can do a work in 90, 30 and 45 days respectively. If they work together, in how many days will they complete the work?

A, B and C can do a work in 90, 30 and 45 days respectively. If the

1.	A, B and C can do a work in 90, 30 and 45 days respectively. If they work together, in how many days will they complete the work?
A.	15
B.	10
C.	20
D.	25
Answer» B. 10

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A, B and C can do a work in 90, 30 and 45 days respectively. If they work together, in how many days will they complete the work?

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