150 x 90 = 13,500 square feet
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100-ft x 90-ft = 9,000 square feet
To find the area of a square, you multiply the length by the width. In this case, 90 ft x 90 ft equals 8100 square feet. This is because each side of the square is 90 feet long, so the total area covered by the square is 8100 square feet.
3 x 30 = 90 square feet. 1 square foot = 144 square inches (12 x 12) So 90 square feet = 12,960 square inches
90 square meters is about 968.7519 square feet.
90 square feet. Multiply length by width - the result is the area in square feet.