Question

5 Using the formula for the volume of a cone, express
r in terms of V, h, and .

Answer 1

Answer:

$r = \sqrt{3V/\pi h}$

Step-by-step explanation:

• $V = 1/3\pi r^{2} h$
• $3V = \pi r^{2}h$ (multiply across by 3)
• $3V/\pi h = r^{2}$ (rearrange to isolate r^2)
• $r = \sqrt{3V/\pi h}$ (get it to be r)