Find the volume of a hemisphere whose diameter is 7 cm. (Take π = $$\frac{22}{7}$$​) (Rounded up to two decimal places)

Correct option is A

Given:
Diameter of the hemisphere = 7 cm
=> Radius = 7 ÷ 2 = 3.5 cm​
Formula Used:
Volume of a hemisphere = $$\frac 23$$​ × π × r³
Solution:
Volume of a hemisphere 

$$\begin{aligned}&= \left( \frac{2}{3} \right) \times \left( \frac{22}{7} \right) \times (3.5)^3 \\&= \left( \frac{2}{3} \right) \times \left( \frac{22}{7} \right) \times 42.875 \\&= \frac{2 \times 22 \times 42.875}{3 \times 7} \\&= \frac{1886.5}{21} \\&\approx 89.83\ \text{cm}^3\end{aligned}$$​​