A rectangular tank needs to be coated with insulation. The tank has dimensions of 3 feet, 6 feet, and 2 feet. Each square foot of insulation costs $20. How much will it cost to cover the surface of the tank with insulation?
Choices.
A) $ 980	B) $ 1060	C) $ 1220	D) $ 1440	E) $ 1650

Rationale: the total surface area is 2 ( 2 * 3 + 3 * 6 + 2 * 6 ) = 72 square feet the total cost is 72 * $ 20 = $ 1440 the answer is d .
Answer: D