Question

The diameter of a circular playground is 21m. Calculate the cost of repairing the floor of the playground at the rate of RS. 230/m^2 and also find the cost of fencing the playground at the rate of RS. 75/m.​

Answer 1

Step-by-step explanation:

diameter= 21m, radius = 21/2 m

area of floor= πr²= 22/7 × 21/2 × 21/2

= 356.5 m²

Cost of repairing= 356.5×230= 79695 rupees

Circumference= 2πr = 2×π×21/2

= 2×22/7×21/2

= 66 m

cost of fencing= 66×75

= 4950 rupees

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