A 2 inch hose carries how many times the volume of a 1 inch hose?

The formula for volume of a pipe (or hose) is V =(PI/4) * D2 * L Assuming that each section of hose is the same length, we can find the volume for each diameter hose. V2-inch = (PI/4)*(2 in)2*L = PI*L V1-inch = (PI/4)*(1in)2*L = 0.25PI*L So the ratio of volumes of 2 inch to 1 inch hose is : V2-inch / V1-inch = PI*L / 0.25PI*L = 4:1