The floor area of the room is probably 11*13 = 143 sq feet - assuming te numbers given in the question are in feet.
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rooms are generally measured in 'square feet'. Take the length of the room multiplied by the width to get this measurement. materials used to cover walls and floors can be measured in square feet or square yards. to get square yards, divide the total square feet by 9.
To calculate the square footage of a room, you multiply the length by the width. In this case, the room is 10 feet by 15 feet, so the square footage would be 10 x 15 = 150 square feet.
In order to calculate that, we also need to know the length of the room.
70 square feet on the ceiling, and another 70 square feet on the floor. We don't know how many square feet on the walls unles we know the height of the ceiling.