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The slant height and base diameter of a conical tomb are 25 m and 14 m, respectively. Find the cost of whitewashing its curved surface at the rate of Rs 210 per `100 m^2`.

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MBD-Surface Areas and Volumes-Exercise
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  9. Find the total surface area of a cone, if its slant height is 9 m and ...

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  17. A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius...

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