Question

4 men can do a work in 7 days how many men are required to do it in 4 days​

Answer 1

7 men are required to do it in 4 days​

Step-by-step explanation:

No. of men required to complete work in 7 days = 4

No. of men required to complete work in 1 day = $4 \times 7$

No. of men required to complete work in 1 day = 28

No. of men required to complete work in 4 day = $\frac{28}{4}$

No. of men required to complete work in 4 day =7

Hence 7 men are required to do it in 4 days​

#Learn more:

It requires 12 men to do a work in 4 days . How many days 16 men will require to do the same work​

https://brainly.in/question/14115168

Answer 2

Explanation :

If the number of men increases ,the days to finish the work decreases .

Clearly , number of men varies inversely to the number of days.

$So, \:here \: \frac{x_{1}}{x_{2}} = \frac{y_{2}}{y_{1}} , \: where$

$x_{1} = 4 \: men , \: y_{1} = 7 \:days \\x_{2} = \red{?} \: men , \: y_{2} = 4 \:days$

$Substitute ,\: \frac{4}{x_{2}} = \frac{4}{7}$

$\implies 4 \times \frac{7}{4} = x_{2}$

$\implies x_{2} = 7 \: men$

Therefore.,

$7 \: men \: are\: required \: to \:do \: the \\work \: in \: 4 \:days$

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