In a room with a floor area of 20 m2, a square rug with a side of 2 meters was placed.

In a room with a floor area of 20 m2, a square rug with a side of 2 meters was placed. What area of the room was left unoccupied by the carpet?

Let’s calculate with the help of how many square meters we have the opportunity to express the area of the rug, which has a square shape, when we know, in accordance with the available data in the conditions of our problem, that its side is equal to two meters:
2 * 2 = 4.
Let’s calculate how much of the room remained free after this rug was laid, when we know that the total area of this room is 20 m2:
20 – 4 = 16.
Answer: There is a free area of 16 m2, that is, answer (3).