What is the volume of the cone

V = Pi(r^2)(h/3)
r = 3
h = 9

V = 3.14(3^2)(9/3)
V = 3.14(9)(3)
V = 3.14(27)
V = 84.8 cubic in

1/3 ×3.14 × r2 × h
use this and you can find the answer to your question 
I hope this helps 

I’m guessing that the answer is c, but i’m not sure which grid is being talked about. since 5x5= 25 and 3x3= 9 (which there are no answers for). a is not right because while the ratio is the same, 6/25= 0.24 which is equal to 24% not 30%.