184k views
5 votes
The volume of a​ cone-shaped hole is 21πft3 If the hole is 7ft​ deep, what is the radius of the​ hole?

1 Answer

14 votes

Answer:

r = 3ft

Explanation:

example of a cone-shaped hole is a funnel

V = 1/3 • π • r² • height

21π = 1/3 • π • r²• height

(21)3 = (1/3 • r² • 7)3

63/7 = (r² • 7)/7

√9 = √r²

r = 3

User Dheemanth Bhat
by
6.3k points