WAEC 2022 · Paper 1 · Q40

Find, correct to two decimal places, the volume of a sphere whose radius is $3\text{ cm}$ . $\left[\text{Take }\pi = \frac{22}{7}\right]$

Worked solution (try it first)

Volume of a sphere: $\frac43\pi r^3$ , and $3^3 = 27$ .
$\frac43 \times \frac{22}{7} \times 27 = \frac{792}{7}$
$\approx 113.14\text{ cm}^3$ , option D.