If 9 men working 71/2 hours a day can finish a piece of work in 20 days, then ho

Question

If 9 men working 71/2 hours a day can finish a piece of work in 20 days, then how many days will be taken by 12 men, working 6 hours a day to finish the work? It is being given that 2 men of latter type work as much as 3 men of the former type?

Options:

A . 91/2

B . 11

C . 121/2

D . 13

Answer: Option C

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