Question

Choose the most appropriate option:

A circular park, 42 m in diameter, has a path 3.5 m wide running around it on the outside. Find the cost of graveling the path at Rs. 4 per m²

Options

• Rs. 2002

• Rs. 1652

• Rs. 1672

• Rs. 2048

Answer 1

Rs. 2002

Explanation:

Internal radius = 21 m, External Radius

= 21 + 3.5 = 24.5 m

Area of path = π (24.5)² - π (21)²

= π [(24.5)² - (21)²]

= 500.5

Cost of travelling = 500.5 × 4 = 2002