12 men and 18 boys working 7.5 minutes an hour complete a particular – McqOptions

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1.	12 men and 18 boys working 7.5 minutes an hour complete a particular piece of work in 60 hours. If a boy’s work is half as efficient as a man’s work, how many boys will be needed to help 21 men to achieve twice the work in 50 hours working 9 minutes in an hour.
A.	42
B.	46
C.	48
D.	38
Answer» B. 46

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