21.20ft^3 - I think
Step-by-step explanation
To get the area of a 2d object, you would need to do (1.5•1.5)•3.14
So (1.5 • 1.5) =2.25
2.25•3.14 = 7.065
Now that you have the base, you need to multiply it by the height.
7.065 • 3 = 21.195 ≈ 21.20ft^3
Correct me if I am wrong