8. A hydraulic cylinder with a 2.5-in. bore and a 1.25-in. cylinder rod receives fluid at 12 gal/min through 3/4-in. Schedule 40 pipe. What is the velocity of the fluid through the return line when the cylinder is retracting (clue: draw an illustration showing the direction of flow). 9. Calculate the corrected length and diameter size for a niston rod in a rear trunnion