Question

Find the cost of fencing a square park of side 150 m at the rate of Rs 20 per metre.​

Answer 1

Length of each side of a square = 150m

Length of four side (perimeter)  of a square = 150 × 4 =600m

Cost of fencing 1 m = Rs. 20

Cost of fencing 600m = 600 × 20 = Rs. 12,000

Answer 2

As per the data given in the question.

in the above question it is given that,

The given data is, side of a square is 150m.

We have to find the cost of fencing.

Here we have to use the formula of perimeter.

Thus, the perimeter of square is =4s

where is side of square.

$p = 4 \times 150 \\ p = 600m$

Therefore the cost of fencing is

$= 600 \times 20 \\ = 12000$

Hence the cost of fencing is Rs. 12000.