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प्रश्न
Find the volume of a cylinder, if the diameter (d) of its base and its altitude (h) are: d = 21 cm, h = 10 cm .
उत्तर
\[ \text{ Given: } \]
\[d = 21 \text{ cm, radius, r } = \frac{d}{2} = 10 . 5 \text{ cm } \]
\[\text{ height, h = 10 cm } \]
\[ \text{ Volume of the cylinder, V } = \pi r^2 h\]
\[ = \frac{22}{7} \times \left( 10 . 5 \right)^2 \times 10\]
\[ = 3465 {\text{ cm } }^3 \]
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