Can someone please help me with this?!

Question

If the square footage of a driveway is 512 ft², how many bricks would it take to fill the driveway? The brick size is 7 feet in length and 3 1/2 feet in width.

Answer 1

The square footage of each brick is 7 ft * 3.5 ft, or 24.5 ft². We can calculate 512 ft² / 24.5 ft²/brick to get ~20.898 bricks. So we would need 21 bricks to fill the driveway.