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प्रश्न
Find the volume of a cylinder whose r = 3.5 cm, h = 40 cm .
उत्तर
\[ \text{ Given }: \]
\[r = 3 . 5 \text{ cm, h = 40 cm } \]
\[\text{ Volume of cylinder, } V = \pi r^2 h\]
\[ = \frac{22}{7} \times \left( 3 . 5 \right)^2 \times 40\]
\[ = 1540 {\text{ cm } }^3 \]
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