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7. The inner diameter of a circular well is 3.6 m. It is 10 m deep. Find (l) its inner curoed surface •area. (ii) the cost of pl.astering this curoed surface at the rate of r40 per m2.

7. The inner diameter of a circular well is 3.6 m. It is 10 m deep. Find
(l) its inner curoed surface •area.
(ii) the cost of pl.astering this curoed surface at the rate of
r40 per m2.

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 6228 Points
3 months ago
. (i) Inner curved surface area = 2JrTh = 2 )( 22 )( 36 >< 10 m2 7 20 = 110 m2 SURFACE AREAS AND Vou.JMEs 187 (ii) Cost of plastering = ' (40 >< 110) = '1 4400.

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