Increase the length of the rectangle by 10% and the width by 20%. By what percentage the area of the rectangle has increased.
| March 29, 2021 | education
Assume that the length of the rectangle is x and the width is y.
After the length of the rectangle was increased by 10%, it became x + 0.1x = 1.1x.
After the width of the rectangle was increased by 20%, it became y + 0.2y = 1.2y.
Then the area became: 1.1X * 1.2Y = 1.32xy, and it was x * y = xy, that is, it increased by 32%.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
