Answer:
Explanation:
Mass of water = volume of water x density of water
Volume of water = π r² h
= 3.14 x 6 x 6 x 15
=1695.6 ft³
mass of water = 1695.6 x 62.4 = 106 x 10³ lb.
Centre of mass of water-mass is lifted from a height of ( 7.5 ft , cm of water ) to height of 25 ft .
Rise in height ( h )
= 25 - 7.5 = 17.5 ft
Rise in potential energy
= m g h = 106 x 10³ x 32 x 17.5 = 59360 x 10³ ft lb.
