Rectangle's 47643

The rectangle has an area of ​​147 cm2. One of its sides is three times longer than the other side. We increase the shorter side of the rectangle by 8 cm. By how many cm2 will the new rectangle's area be larger than ​​the original rectangle?

Correct answer:

x =  168 cm2

Step-by-step explanation:

S=147 cm2 a=3b S=ab=3b2  b=S/3=147/3=7 cm a=3 b=3 7=21  S1=a (b+8)=21 (7+8)=315 cm2  x=S1S=315147=168 cm2



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions: