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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 :

[tex]5\cdot10=50 \text{ ft}^2=7200\text{ in}^2 [/tex] <-- the surface area of a patio
[tex]5^2=25 \text{ in}^2[/tex] <-- the surface area of a brick

[tex]7200\div25=288[/tex]

You need 288 bricks.



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