Select the correct answerIf 36 men can do a piece of work in 25 hours, in how many hours will 15 men do it?Options40 hours36 hours72 hours60 hours
Question
Select the correct answerIf 36 men can do a piece of work in 25 hours, in how many hours will 15 men do it?Options40 hours36 hours72 hours60 hours
Solution
The answer can be found using the concept of man-hours.
Step 1: Calculate the total man-hours required to complete the work. This is done by multiplying the number of men by the number of hours they work. In this case, 36 men working for 25 hours gives a total of 900 man-hours.
Step 2: To find out how long it would take 15 men to complete the same work, divide the total man-hours by the number of men. In this case, 900 man-hours divided by 15 men gives 60 hours.
So, 15 men will complete the work in 60 hours. Therefore, the correct answer is "60 hours".
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