Working 12 hours a day, Vaibhav can complete a piece of work in 28 day – McqOptions

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1.	Working 12 hours a day, Vaibhav can complete a piece of work in 28 days. How many hours a day should he work so as finish the work in 21 days?
A.	12
B.	16
C.	15
D.	18
Answer» C. 15

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