12 men and 18 boys, working hours a day, can do a piece of work in 60 – McqOptions

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1.	12 men and 18 boys, working hours a day, can do a piece of work in 60 days. If a man works equal to 2 boys, then how many boys will be required to help 21 men to do twice the work in 50 days, working 9 hours a day ?
A.	30
B.	42
C.	48
D.	90
Answer» B. 42

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