I have been working on this problem for 2 days and cant seem to figure it out.. A 1500hp pump throws a jet of water 125 m into the air. (a) With what speed does the water leave the mouth of the fountain. (b) If the overall efficiency is 60%, how many liters of water per minute are thrown into the air? Thank you for the help as I am pulling my hair out. I think where I am getting lost is that I need to find the velocity without knowing the size of the pipe. Am I on the right track? Should I be using a motion equation to first get the velocity? I am just not sure why I am getting so stuck on this problem.