The inner diameter of a circular well is 3.5 m . It is 10 m Deep find it's curved surface area. The cost of plastering this curved surface at the rate of Rs.40. per m square.

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The inner diameter of a circular well is $3.5 m .$ It is $10 m$ deep. Find :

$(i)$ inner curved surface area.

$(i i)$ the cost of plastering this curved surface at the rate of $R s . 40$ per $m^{2}$ .

R s . 40 p e r m^{2} . [A s s u m e π = \frac{22}{7}]

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 m².

3.5 m

10 m

1584 m^{2}

40

m^{2}

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