Discussion

If diameter of cylinder is 8cm and its height is 16cm then volume of cylinder is

Answer: A

Halve the diameter to get the radius, then apply the volume formula with \( \pi = 3.142 \).

\[ r = \frac{8}{2} = 4 \text{ cm}, \qquad h = 16 \text{ cm} \]

\[ V = \pi r^{2} h = 3.142 \times 16 \times 16 \]

\[ V = 3.142 \times 256 = 804.352 \text{ cm}^{3} \]

Using the diameter in place of the radius would quadruple the answer to about 3217 cm³.

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