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The inner diameter of a circular well is...

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 ₹ 40 per `m^2` .Assume `pi = 22/7` , unless stated otherwise.

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PSEB-SURFACE AREAS AND VOLUMES-EXAMPLE
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