The width of the rectangle is 3.6 m, which is 0.45 m of its length. The sides of the rectangle

The width of the rectangle is 3.6 m, which is 0.45 m of its length. The sides of the rectangle have increased by 10%. How much has its area increased?

The first step is to calculate what the length of the rectangle is, knowing that 0.45 of it is 3.6 meters.

3.6 / 0.45 = 8 meters.

Let’s calculate what the area of the rectangle is.

S = 8 * 3.6 = 28.8 m².

Let’s increase the length and width by 10%.

8 + 8 * 10/100 = 8 + 8 * 0.1 = 8 + 0.8 = 8.8 meters.

3.6 + 3.6 * 10/100 = 3.6 + 3.6 * 0.1 = 3.6 + 0.36 = 3.96 meters.

Let’s calculate what the area is equal to.

S = 8.8 * 3.96 = 34.848 m².

Let’s calculate how many square meters the area has increased.

34.848 – 28.8 = 6.048 m².

Answer: 6.048 m².