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20x21= 420, so the answer is 420 square feet.
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How many square feet in a 20 x 20 room?
400 square feet, at the school I went to.
How many square feet is a 20 by 17 foot room?
340 square feet
How many square feet are in a room that is 17 feet by 20 feet?
17*20=340 ■
How many square feet are in a 10'X20' room?
10 ft x 20 ft room = 200 square feet
How many square feet is in a room 15 by 20 foot?
15 x 20 = 300 square feet.
Related questions
How many square feet are in a 20 foot by 20 foot room?
A room measuring 20' x 20' = 400 square feet
Room size 20 x 20 is how many square feet?
400 square feet.
How many square feet is a 20X18 room?
A simple rectangular room 20 feet by 18 feet has 360 square feet.
How many square feet in a 20 x 20 room?
400 square feet, at the school I went to.
How many square feet are there in a room that measures 10 feet by 20 feet?
200 square feet
How many square feet in a room 12 x 20?
240 square feet.
How many square feet in a 20 x 14 room?
280 square feet.
How many square feet is a 20 by 17 foot room?
340 square feet
How many square feet are in a room that is 17 feet by 20 feet?
17*20=340 ■
How many square feet is a room 20 feet long 20 feet?
20 ft x 20 ft = 400 square ft
How many square feet are in a 10'X20' room?
10 ft x 20 ft room = 200 square feet
How many square feet in a room 20 feet by 18 feet?
360.
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