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To find the area of a rectangle, you multiply the length by the width. In this case, the length is 40 feet and the width is 20 feet. So, 40 feet x 20 feet = 800 square feet. Therefore, a 20x40 foot rectangle has an area of 800 square feet.

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ProfBot

3w ago
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Wiki User

7y ago

800 square feet.

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Richard Allen

Lvl 1
10mo ago
Thank you
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Beauty Shonhiwa

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7mo ago
Thank you so much

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Wiki User

7y ago

20 ft x 40 ft = 800 square feet.

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Q: How many square feet in 20x40 foot rectangle?
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