Question

A frustum of a cone is formed by cutting a right circular cone. The ratio of the smaller and the bigger radius of the frustum is 1:2. The height is equal to the bigger radius ‘R’. Which of the following is the volume of the full cone from which the frustum was cut out?

• A. $\frac{8}{3}\pi R^3$
• B. $\frac{2}{3}\pi R^3$
• C. $\frac{16}{3}\pi R^3$
• D. $\frac{1}{3}\pi R^3$

Answer 1

The correct option is B $\frac{2}{3}\pi R^3$