There are 144 square inches in a square foot. This calculates out to be 5,040 square inches.
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To find the area of a room that is 35 feet by 35 feet, you would multiply the length by the width. So, 35 feet x 35 feet = 1225 square feet. Therefore, a room that is 35 feet by 35 feet has an area of 1225 square feet.
1 foot=12 inches 35/12=2 11/12 feet
490 square feet.
1 foot = 12 inches 35 feet = 12 x 35 = 420 inches
35 square feet. To calculate square feet simply multiply length by width - the result is the area in square feet.