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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
Solution
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
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