Question

Find the cost of fencing a square lawn of side 18m at a rate of Rs 2 per meter.

Answer 1

Answer:

Cost of fencing = 144 Rupees

Step-by-step explanation:

According to the information provided in the question it is given as

Side of square = a = 18 m

We need to find the cost of fencing at the rate 2 /m

The perimeter of the square is  total length of the boundary of a square. Adding all the sides of square finding perimeter.  

So Perimeter = sum of all sides.

Also we can write as

Perimeter of square = Sum of the lengths of 4 sides.

Here the cost of fencing  = Perimeter of square

By putting the values we get the answer

Perimeter = 4 a

$P =4\times 18\\P= 72 m^{2}$

Cost of fencing = Perimeter x rate /m

                          = 72 x 2

                          = 144 Rupees

Hence cost of fencing is 144 Rupees