A man, a woman or a boy can do a job in 30 days, 60 days and 90 days respectively. How many boys must work with five men and four women to finish the same work in three days?

A man, a woman or a boy can do a job in 30 days, 60 days and 90 days r

1.	A man, a woman or a boy can do a job in 30 days, 60 days and 90 days respectively. How many boys must work with five men and four women to finish the same work in three days?
A.	3
B.	6
C.	9
D.	12
Answer» D. 12

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A man, a woman or a boy can do a job in 30 days, 60 days and 90 days respectively. How many boys must work with five men and four women to finish the same work in three days?

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