Estimate the cost of painting the inner wall of a well, if the depth of the well is 14 feet and diameter is 8 feet. The cost of paint 2.5 sq.ft is rupees 20.
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30
cost of painting = Rs(20 * C.S.A of well/2.5)
= Rs (20 * 2 * 22/7 * 4 * 14 * 1/2.5)
= Rs 2816
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10
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