Question

What is the volume of a cone having radius of 21cm and height of 5cm?

(a) 2310cm^3

(b) 2500cm^3

(c) 6930cm^3

(d) 7500cm^3

This question was posed to me in an internship interview.

I'd like to ask this question from Volume of a Right Circular Cone topic in chapter Surface Areas and Volumes of Mathematics – Class 9

Answer 1

Correct option is (a) 2310cm^3

Explanation: We know that volume of a cone = \(\frac{1}{3}\) πr^2h

= \(\frac{1}{3} * \frac{22}{7}\) * 21 * 21 * 5

= 6930cm^3.