The length of the rectangle is 26cm. how much will the area of this rectangle increase

The length of the rectangle is 26cm. how much will the area of this rectangle increase if its width increases from 15 cm to 20 cm?

1. Determine the area of the rectangle before increasing its width:

26 x 15 = 390 cm²;

2. Determine the area of the rectangle after increasing its width:

26 x 20 = 520 cm²;

3. Determine how many square centimeters the area of the new rectangle is larger than the previous one:

520 – 390 = 130 cm².

Answer: 130 cm² more area of the new rectangle than the previous one.