13 feet
13' x 15' (195 square feet) = 21.67 square yards of carpet needed.
At least 31.77 square yards are needed.
If mean how many square feet are in 13 feet by 25 feet, then the answer is 325 square feet. (13 x 25 = 325)
13' x 13' (169 square feet) = 18.77 square yards. (divide square feet by 9 to get square yards)
Its 169 square feet.
if you mean 13 feetx13 feet, then answer is 169 square feet
12 x 13 = 156 square feet.
8 ft x 13 ft = 104 square feet
13' x 17' = 221 square feet.
13 x 16 = 208 square feet.
13 x 20 = 260 square feet.