If six people dig a well 200m deep in 15 days, the number of people that are required to dig the same well in 18 days is _____?
- 15
- 5
- 10
- None of these
Explanation
6 people dig a 200m well in 15 days.
To find the total work done in terms of "man-days":
6 people × 15 days = 90 man-days
Now, let's find the number of people required to dig the same well in 18 days:
Let x be the number of people required.
x people × 18 days = 90 man-days
x = 90 / 18
x = 5
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