Right choice is (b) 1232cm^3
The best I can explain: As shown in the figure, when the cone is formed, its base radius is 14cm and height is 24cm.
We know that volume of a cone = \(\frac{1}{3}\) πr^2h
= \(\frac{1}{3} * \frac{22}{7}\) * 7 * 7 * 24
= 1232cm^3.