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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 Rs 40 per `m^2`.

Text Solution

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1) CSA=`2pirh`
=`2xx22/7xx(3.5/2)^2xx10`
=`110m^2`
2)`1m^2=40Rs`
`110m^2=110xx40Rs`
`= 4400Rs`
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