simply multiply. A linear foot in either direction is still a foot. Foot times foot equals square feet. That's 225 square feet.
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multiply: 17 ft x 15 ft = 255 sq. ft.
room height=8ft, width=13ft lengh=15ft. what is square feet?
Cannot answer this. Need to know the # of square feet each can of paint covers.
17ft x 15ft = 255 ft2
109.65 square feet. Length x width = square feet.