Answer: the tank filled with water weighs 4,710 pounds.
Step-by-step explanation: where:
π = 3.14 (surmised esteem of pi)
r = span = 2 feet
h = tallness = 6 feet
V = 3.14 x (2 feet)^2 x 6 feet
V = 75.36 cubic feet
Since one cubic foot of water weighs 62.5 pounds, the weight of the water within the tank can be calculated by increasing the volume of water by its weight:
Weight of water = volume of water x weight per cubic foot
Weight of water = 75.36 cubic feet x 62.5 pounds per cubic foot
Weight of water = 4,710 pounds