The inner diameter of a circular well is 3.5 m. It is 10 m deep. Find(i) its inner curved surface area,(ii) the cost of plastering this curved surface at the rate of Rs. 40 per.

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Inner radius (r) of circular well Depth (h) of circular well = 10 m Inner curved surface area = 2πrh = (44 × 0.25 × 10) m2 = 110 m2 Therefore, the inner curved surface area of the circular well is 110 m2. Cost of plastering 1 m2area = Rs 40 Cost of plastering 110 m2area = Rs (110 ×...
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Inner radius (r) of circular well Depth (h) of circular well = 10 m Inner curved surface area = 2πrh = (44 × 0.25 × 10) m2 = 110 m2 Therefore, the inner curved surface area of the circular well is 110 m2. Cost of plastering 1 m2area = Rs 40 Cost of plastering 110 m2area = Rs (110 × 40) = Rs 4400 Therefore, the cost of plastering the CSA of this well is Rs 4400. read less
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