Question
The inner and outer radii of a circular track are 28 m
and 25 m, respectively. The cost (in ₹) of levelling the track at ₹28 per m² is: [Use π = 22/7]Solution
Area outer = 22/7 ×28 × 28 = 2464 sq m Area inner = 22/7 × 25 × 25 = 1964.29 sq m Area track = 2464 − 1964.29 = 499.71 sq m Cost = 499.71 × 28 = ₹13,991.88 ≈ 13992
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