A hemispherical tank has an inner diameter of 1.4 m. Find its capacity. (Take π = $$\frac{22}{7}$$)(Rounded up to two decimal places)

Correct option is B

Given:
Diameter = 1.4 m
Radius (r) =$$\frac{\text{Diameter}}{2}$$​ = 0.7 m
Formula Used:
Volume of hemisphere = $$\frac 23$$​× π × $$r^3$$​​
Solution:
Volume of hemisphere = $$\left(\frac{2}{3}\right)\times\left(\frac{22}{7}\right)\times 0.7^3= \left(\frac{2}{3}\right)\times 1.078= \frac{2.156}{3}= 0.718666\ldots = 0.72 \text{m}^3$$ ​