The house has the shape of a rectangular parallelepiped. The length and width of the house is 20 cm

The house has the shape of a rectangular parallelepiped. The length and width of the house is 20 cm, when a veranda was added to the house, the length of the house became 30 cm. How many square meters did the house area increase? Why is the total area of the house?

The area of the house before the veranda extension S1 is determined by the product of length and width, S1 = 0.2m * 0.2cm = 0.04m ^ 2. After the veranda has been attached, its area will become S2 = 0.2m * 0.3m = 0.06m ^ 2. In order to find how much the area of the house has increased, it is necessary to subtract from the larger value the smaller value of 0.06m ^ 2 – 0.04m ^ 2 = 0.02m ^ 2.
Answer: the area of the house before the extension is 0.04 m ^ 2, the area of the house after the extension is 0.06 m ^ 2, the area of the house has increased by 0.02 m ^ 2.