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20. \( A \) toy is in the form of a cone mounted on a hemisphere of common base radius 7 ? The total height of the toy is 3\( \uparrow \mathrm { cm } . \) Find the total surface area of the toy (Use \( \pi = \frac { 22 } { 7 } ) \) CBSE \( 2007 - 3 \mathrm { N } \)

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