Hi there!
Here is the formula to find the volume of a cylinder :
V =
× r² × h
Where :
V = volume
r = radius
h = height
Now that you have your formula, replace the information you know in the formula and solve the equation :
V =
× 4² × 3
V =
× 48
V = 150.796447
V ≅ 150,8 feet
There you go! I really hope this helped, if there's anything just let me know! :)