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Calculating whether I had enough paint to decorate a room in my house ! I had to work out what size tin of emulsion to get. Since the estimated coverage of the tin of paint is displayed on the label - knowing the area I wanted to paint enabled me to buy the correct size of tin.

Additionally - calculating the area of carpet required for the newly-painted room ensured I didn't have too much left over after I cut it to fit !

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13y ago
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Q: Where you ever had to use surface area outside of math?
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