Kendra used 225 cubic feet of concrete to make her new patio. the patio is a rectangular concrete slab and measures 25 feet by 18 feet. How thick is the concrete slab?

The formula for volume is V = (L) (W) (H). Length, width, and height are multiplied together. In this case, height is thickness. Since we are given the total area, length, and width, we just need to solve for the height/thickness. Plug in the given values:

225 = (25) (18) (H)

225 = 450*H

H = 225 : 450

H = 0.5

The concrete slab is 0.5 feet thick.