WAEC 2023 · Paper 1 · Q18

Solid mensuration

The radius of a sphere is $3\text{ cm}$ . Find, in terms of $\pi$ , its volume.

Worked solution (try it first)

Volume of a sphere: $\frac43\pi r^3$ , and $3^3 = 27$ .
$\frac43 \times 27 = 36$ , so the volume is $36\pi\text{ cm}^3$ , option C.

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