The internal and external radii of a hollow hemispherical bowl are \( 15 \mathrm{~cm} \) and \( ...

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The internal and external radii of a hollow hemispherical bowl are \( 15 \mathrm{~cm} \) and \( 16 \mathrm{~cm} \) respectively. Find the cost of painting the bowl at the rate of 35 paise per \( \mathrm{cm}^{2} \), if
(i) the area of the edge of the bowl is ignored.
(ii) the area of the edge of the bowl is taken into account.
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