Select the correct answerIf 36 men can do a piece of work in 25 hours, in how many hours will 15 men do it?Options36 hours72 hours60 hours40 hours
Question
Select the correct answer
If 36 men can do a piece of work in 25 hours, in how many hours will 15 men do it?
Options:
- 36 hours
- 72 hours
- 60 hours
- 40 hours
Solution
The problem can be solved 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. So, 36 men working for 25 hours gives 36*25 = 900 man-hours.
Step 2: Calculate how many hours it would take 15 men to complete the same work. This is done by dividing the total man-hours by the number of men. So, 900 man-hours divided by 15 men gives 900/15 = 60 hours.
Therefore, 15 men will complete the work in 60 hours. So, the correct answer is 60 hours.
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