Use the following information to answer questions 39-41.
The end-on view of a cylindrical milk tank on its support is shown in the figure below. The interior radius of the tank’s circular end is 4 feet. The interior length of the tank is 25 feet.
40. The tank currently holds 5,000 gallons of milk. Each gallon of milk weighs about 8 pounds. About how many pounds does this milk weigh?