Ethanol Has a Specific Gravity of 0

Ethanol has a specific gravity of 0.78 at a certain temperature. If the density of water at the same temperature is 62.4 pounds per cubic foot, how many cubic feet of the ethanol will weigh 19.3 kg? (1.0 kg = 2.20 pounds) Hint: Remember that when converting derived units, you must convert each of the component fundamental units individually.

A) 4.15 ft³
B) 0.180 ft³
C) 0.397 ft³
D) 0.872 ft³
E) 48.7 ft³