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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

Verified by Experts

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