Question

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

Answer 1

Step 1: Find perimeter of square park

Given, side length of square park, $S=250\mathrm{m}$

Perimeter of square, $\mathrm{P}=4S$

$$\begin{gathered} \Rightarrow \mathrm{P}=4\times 250 \\ \Rightarrow \mathrm{P}=1000\mathrm{m} \end{gathered}$$

Step 2: Calculate cost of fencing

Given, cost of fencing per metre $=₹20$

Thus, cost of fencing around the park $=\mathrm{P}\times \mathrm{cost}=1000\times 20=₹20,000$

Therefore, the cost of fencing the square park is $₹20,000$.