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
7.9m questions
10.6m answers