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# Find the cost of fencing a square park of side $ 250 \mathrm{~m} $ at the rate of $ Rs.\ 20 $ per metre.

**Given:**

The side of the square park is $250\ m$.

**To do:**

We have to find the cost of fencing the square park of side 250 m at the rate of Rs. 20 per metre.

**Solution:**

The side of square park $ = 250\ m$

We know that,

The perimeter of a square with side $a$ is $4a$.

Therefore,

The perimeter of square park $ = 4\times$ each side of the square park

$= 4\times250$

$= 1000\ m$

Since,

The cost of fencing the square park $ = Rs.\ 20\ per\ m$

The cost of fencing the square park for $1000\ m = Rs.\ 20\times1000$

$ = Rs.\ 20,000$

The cost of fencing the square park of side 250 m at the rate of Rs. 20 per metre is $Rs.\ 20,000$.

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