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1,600 feet.

To find the square feet of an area you need to multiply the length by the width. 20 times 80 equals 1,600.

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Wiki User

14y ago
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IT IS 100,000,000,123 million infanet

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Anonymous

Lvl 1
4y ago

800sqft

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Q: How many square feet in a 20' x 80' house?
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