If a tank can be build by 18 men in 28 days while working for 9 hours – McqOptions

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1.	If a tank can be build by 18 men in 28 days while working for 9 hours per day, how many hours per day do 21 men have to work for 36 days, to complete the same tank?
A.	4
B.	5
C.	9
D.	6
Answer» E.

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