#1.
24" is in inches while the ground measurement is in feet. convert: 24" = 2'
1800' × 1500' × 2' = 3,600,000 ft³
#2.
The height and width of the truck-bed is 7.5 feet. The length is 15 feet. Divide the truck-bed height/width by the side length of the cube shaped box, 2.5 feet.
height:
7.5'÷ 2.5' = 3 boxes can be stacked
width:
7.5' ÷ 2.5' = 3 boxes side by side
length:
15' ÷ 2.5' = 6 boxes long
3 × 3 × 6 = 54 boxes can fit in the truck
