Question

Patio bricks come in a square size, 5 inches on a side. To make a patio 5 ft. by 10 ft. wide, how many bricks do you need?

Answer 1

`5\cdot10=50 \text{ ft}^2=7200\text{ in}^2` <-- the surface area of a patio

`5^2=25 \text{ in}^2` <-- the surface area of a brick


`7200/25=288`

You need 288 bricks.