What is the horsepower of a pump that moves 450 lbs of water against a discharge head of 220 ft. In 1 minutes? Disregard friction and other losses.

HP = (d * F) / (t * 33,000)
                                     HP = (d * F) / (t * 33,000)
                                     HP = (220 * 450) / (1 * 33,000)
                                     HP = 3
Where,
                                     HP       horsepower
                                     d          distance
                                     F          force (lb)
                                     t           time (minutes)
                                     33,000 constant