Question

the diameter of a circular Park is 24 m a y 3M wide path Run around it form inside find the cost of paving the park at ₹25 metre per square metre

Answer 1

Given diameter of the park is 24m, therefore radius will be = 24/2 = 12m

Area of the circular park = πr²
= 22/7×12×12
= 3168/7m²

According to the question, the 3m wide path is inside the park.

Therefore radius of the park excluding path is = 12-3 = 9m

Area of the park excluding path = πr²
= 22/7×9×9
= 1782/7m²

Hence, area of the path = 3168-1782/7
= 1386/7
= 198m²

Area of the park excluding the path = 3168/7 - 1386/7
= 1782/7m²

Total Cost of paving the park at the rate of ₹25 per m² = 1782/7×25
= 44550/7
= ₹6364.28 (approximately)

Hope it's right..