The velocity of oil in a supply line changes from 5.1 to 6.3 ft 3 /s when going from a large bore to a smaller bore pipe. If the bore of the smaller pipe is 8.1 in diameter, what is the bore of the...

The velocity of oil in a supply line changes from 5.1 to 6.3 ft³
/s when going from a large bore to a smaller bore pipe. If the bore of the smaller pipe is 8.1 in diameter, what is the bore of the larger pipe?

Water in a 5.5-in diameter pipe has a velocity of 97 gal/s; the pipe splits in two to feed two systems. If after splitting, one pipe is 3.2-in diameter and the other 1.8-in diameter, what is the flow rate from each pipe?