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Mathematics 19 Online
OpenStudy (anonymous):

A rectangular plot measures 20 ft. by 30 ft. A 3-ft.-wide sidewalk surrounds it. Find the area of the sidewalk.

OpenStudy (mathmale):

I'd suggest you draw both the plot and the sidewalk. Then it'd be easier to see which areas you must find and add together to find the total area of the sidewalk.

OpenStudy (skullpatrol):

Great suggestion @mathmale

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