V = pi * r^2 * h
V = 3.14 * 3^2 * 12
V = 339.12
This is the volume of the bottle of lotion, now let's find the volume of the empty tube inside, then we can subtract that from the total volume of the bottle of lotion.
V = pi * r^2 * h
V = 3.14 * 0.5^2 * 12
V = 9.42
This is the volume of the empty space inside the lotion, now subtract it from the total:
339.12 - 9.42 = 329.7
So the volume of the lotion inside the bottle is 329.7.