To solve this problem you must apply the formula for calculate the volume of a cylinder, which is shown below:
 V=πr²h
 V is the volume of the cylinder.
 r is the radius of the cylinder (r=1.25 ft).
 h is the height of the cylinder (h=4 ft).
 When you substitute these values into the formula ofr calculate the volume of the cylinder, you obtain:
 V=πr²h
 V=π(1.25 ft)²(4 ft)
 V=19.63 ft³
 Therefore, the answer is: 19.63 ft³