Mathematics
NULL
Medium
Question
A circular path of 13 m radius has a marginal walk 2 m wide all round it. Find the cost of leveling the walk at 25 p per m².
A
Rs.45
B
Rs.78
C
Rs.44
✓ Official correct answer
D
Rs.40
Community credibility
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A
Rs.45
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B
Rs.78
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C
Rs.44
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D
Rs.40
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Explanation
Walk area = π(15² − 13²) = π × 56 = 176 m². Cost = 176 × 0.25 = Rs. 44.