a concrete area measures 20ft on each side. the concrete slab will be 8 inches deep. how many cubic feet of concrete will be needed?

my set up is 20 x 20 + 32 ????

cubic feet= LWH=20*20*8/12=?

By the way, did you figure out that age problem?

if x = 10
then 6+3x = 36

To calculate the amount of concrete needed, you need to find the volume of the concrete slab.

First, convert the depth of the slab from inches to feet. Since there are 12 inches in a foot, divide the depth of 8 inches by 12:
8 inches ÷ 12 inches/foot = 0.67 feet (approximately)

Now, multiply the length, width, and depth to find the volume of the slab:
Volume = Length × Width × Depth
Volume = 20 feet × 20 feet × 0.67 feet
Volume = 268 cubic feet

Therefore, you will need 268 cubic feet of concrete for the given dimensions.