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A cyclindrical pillar has radius 21 c...

A cyclindrical pillar has radius 21 cm and height 4m . Find
(i) the curved surface area of the pilar
(ii) cost of poilshing 36 such cyclindrical pillars at the rate of rupes 12 per ` m^(2)`.

Text Solution

Verified by Experts

The correct Answer is:
`5.28 m ^(2) (ii) 2280 . 96`
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