Math CentralQuandaries & Queries


Question from trudy:

if I have 250 sq ft of space that I want to fill with bricks that measure 7.5 in by 11.5 in how many bricks do I need to fill the 250 sq ft.

Hi Trudy,

There are 12 inches in a foot so 250 square feet in $250 \times 12 \times 12 = 36,000$ square inches. Each brick covers $7.5 \times 11.5 = 86.25$ square inches. $\large \frac{36,000}{86.25} \normalsize = 417.4$ and thus you will need at least 418 bricks. There is bound to be some wastage so you should round up somewhat.

I hope this helps,

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