Answer: 311.542 pounds or .155771 tons
Step-by-step explanation:
1 cubic foot = 7.48 gallons
1 gallon = 8.33 pounds
so...
1 cubic foot = 7.48 • 8.33 = 62.3084 pounds
5 cubic feet = 62.3084 • 5 = 311.542
1 ton = 2000 pounds
311.542/2000 = .155771 tons