225 square feet
The question does not give the units of measurement for the room's size. Assuming they are feet, the square footage is 12*15 = 180 square feet.
20 x 15 = 300 square feet.
15 *60 = 900
It is: 15*12 = 180 square feet
15 by 15 means 15 multiplied by 15 which would give you a square footage of 225 feet.
approx. 172.5 square feet
if you want the square footage, 15 ft x 20 ft is 300 square feet
If the given dimensions are in feet then 12 times 15 = 180 square feet
9 feet x 15 feet = 135 square feet.
330 square feet
135 square feet. Just multiply length by width - the answer is the square footage.