15 x 15 is a square unit whereas foot is a linear unit.
A linear unit can be said to have either zero or infinite width which means that either no matter how many feet you have you will never cover any area 15 x 15 or 15 x 15 is as near to zero feet as makes no odds.
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15 x 15 = 225 square feet
There are 30.48 centimetres in one foot. Therefore, 15 feet is equal to 15 x 30.48 = 457.2 centimetres.
15 feet = 457.2 cmThere are 30.48 centimetres in one foot. Therefore, 15 feet is equal to 15 x 30.48 = 457.2 centimetres.
There are 12 inches to a foot, and 15 x 12 = 180
-15 < x