Cone Volume = (π • r² • h) ÷ 3
radius = 4
height = 24
Cone Volume = (PI *4*4*24)/3
Cone Volume = 402.12
If we reduce the height by 4 (from 24 to 6) then we have to increase the radius by 2 (from 4 to 8) because the radius is squared.
Cone Volume = (PI *8*8*6)/3
Cone Volume = 402.12