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Question

10 people can dig a trench in 6 days. How many people can dig it in 4 days?

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Solution

Let x people dig the trench in 4 days.
No. of people 10 x
No. of days 6 4

More people will take less number of days to dig the trench. Hence, this is a case of inverse proportion.

Now, 10×6=x×4x=604x=15

∴ 15 people can dig the trench in 4 days.

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