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प्रश्न
Find the curved surface area whose height is 15 cm and the radius of the base is 7 cm.
उत्तर
\[ \text{ Given: } \]
\[\text{ Height, h = 15 cm } \]
\[ \text{ Radius, r = 7 cm } \]
\[\text{ Curved surface area, } S_1 = 2\pi rh\]
\[ = 2 \times \frac{22}{7} \times 7 \times 15\]
\[ = 660 {\text{ cm } }^2 \]
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