Okay, so the ratio is 3:2 (cylinder to cone)
The equation for finding the volume of a cylinder is V=pi*r^2*h (h stands for height)
We plug in the values: V=3.14*4*4*9
This equals 452.16.
Next, the cone. It’s formula is: V=pi*r^2*h/3
Plugging in the values we get: V=3.14*4*4*18/3 (simplifying to 6)
Solving we get: 301.44.
When we divide 301.44 by 2 we get 150.72
(I originally divided 452.16/301.44 to find the scale factor) Now we multiply 150.72 by 3 to get 452.16, and we already know that 150.72 times 2 equals 301.44. So the ratio is 3:2.
I hope this helps!