Question

The perimeter of a square courtyard is 144m. Find the cost of cementing it at the rate of rs 5 per m square​

Answer 1

Answer:

720 Rs.

Step-by-step explanation:

perimeter of fence = 144 m

cost of fence per sq.m = 5 Rs.

total cost of fence = 144 * 5

                              =720 Rs.

Answer 2

Answer:

Given ,

perimeter = 144 m

we know that perimeter of square = 4a , where a is the length of the side

4a = 144 m

a = 144 / 4

 = 36 m

area of square is given as ,

area = a²               [ where , a is the length of side ]

By substituting the values ,

a² = ( 36 )²

a² = 1296 m²

Cost per unit m = ₹ 5

cost for the area of the square ,

cost = 1296 × 5

       = ₹ 6480

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