20 men can build a boat in 9 days, working 5 hours a day. In how many days will 25 men, working 6 hours a day, complete the work?

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Solution

The correct option is C 6
The total number of working hours required for the work will remain the same.
Let the required number of days with 25 men working for 6 hours be d.

20 x 9 x 5 = 25 x 6 x d

d = 6

So, it takes 6 days to build the boat.

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