A tri-axle truck typically holds 11 yards of concrete. A dry yard weighs 3,500 pounds A standard conrete mix uses 500 pounds of cement. 1,200 pounds of sand, and 1,800 pounds of gravel or crushed stone. 3,000 grade concrete for sidewalks is $82.00 per cubic yard. 3,500 grade conrete for driveways is $83.50 per cubic yard. Gravel is 1.4 tons per cubic yard. One gallon of water weighs 8.35 pounds, and there are 7.48 gallons in a cubic foot. #1. How much concrete would you need for a driveway that is 10 ft by 45 ft and 9 inches deep?