Answer:
908360.67 lb-ft
Step-by-step explanation:
height of tank= 6 ft
diameter of the tank = 4 ft
density of water p = 62.4 lbs/ft
A is the cross sectional area of the tank
A = [tex]\pi r^{2}[/tex]
where r = diameter/2 = 4/2 = 2 ft
A = 3.142 x [tex]2^{2}[/tex] = 12.568 ft^2
work done = force x distance through which force is moved
work = F x d
Force due to the water = pgAh
where g = acceleration due to gravity = 32.174 ft/s^2
Force = 62.4 x 32.174 x 12.568 x 6 = 151393.44 lb
work done = force x distance moved
work = 151393.44 x 6 = 908360.67 lb-ft
