Chapter 4: Quadratic Equations

Example 11. Is it possible to design a rectangular mango grove whose length is twice its breadth, and the area is 800 m2? If so, find its length and breadth.

Solution:- Let breadth = x, then length = 2x

According to question, l × b = 2x × x = 800

Or, 2x2 = 800

Or, x2 = 400

Or, x = 20s

Hence, it is possible to design of length  = 2×20 = 40 m and breadth = 20 m.

 

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Subjects Maths (Part-1) by Mr. M. P. Keshari
Chapter 1 Linear Equations in Two Variables
Chapter 2 HCF and LCM
Chapter 3 Rational Expression
Chapter 4 Quadratic Equations
Chapter 5 Arithmetic Progressions
Chapter 6 Instalments
Chapter 7 Income Tax
Chapter 8 Similar Triangles