Answer:
r= 16.65
Explanation:
Formula of cone V= 1/3 pi r ^2 h
They give us the volume and height, we just need to find the radius.
85= 1/3 pi r^2 9
1/3 of 9 is 3.
85= 3 pi r^2
divide by 3 on both sides.
28.3= pi r^2
square both sides with calculator or logic and round to nearest tenth.
5.3= pi r
divide pi.
r= 5.3 pi = 16.65
To find volume, plug everything in the formula.