# Question: a rectangular tank that is 9 feet long 3 feet...

###### Question details

A rectangular tank that is 9 feet long, 3 feet wide and 3 feet
deep is filled with a heavy liquid that weighs 100 pounds per cubic
foot. In each part below, assume that the tank is initially full.
Your answers must include the correct units. (You may enter
*lbf* or *lb*ft* for *ft-lb*.)

(a) How much work is done pumping all of the liquid out over the
top of the tank?

(b) How much work is done pumping all of the liquid out of a spout
5 feet above the top of the tank?

(c) How much work is done pumping two-thirds of the liquid out over
the top of the tank?

(d) How much work is done pumping two-thirds of the liquid out of a
spout 5 feet above the top of the tank?