Question

I need help with this question

Answer 1

Below

Explanation:

Volume of a cone = 1/3 pi r^2 h

4125 pi = 1/3 pi r^2 h

4125 = 1/3 r^2 h <===if diameter =30 then radius = 15 units

4125 = 1/3 (15)^2 h

4125 / (1/3 * 15^2) = h = 55 units