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# If 7 workers can build a trench in 25 hours, how many workers will be required to do the same work in 35 hours?

Last updated date: 22nd Mar 2023
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Hint: At first find out the value of a unit. That means how many workers will be required to do the work in one hour. Then calculate how many workers will be required to do the work in 35 hours.

In 1 hour $7\times 25$ workers can build the trench.
In 35 hours $\dfrac{7\times 25}{35}$ workers can build the trench.
So, we need $=\dfrac{7\times 25}{35}=5$ workers to build the same trench in 35 hours.