KnowledgeBoat Logo

Mathematics

The sum of the ages of Vivek and his youger brother Amit is 47 years. The product of their ages in years is 550. Find their ages.

Quadratic Equations

29 Likes

Answer

Let the age of Vivek be x years.

Since sum of ages of vivek and amit is 47, so amit's age = (47 - x) years

Product of ages = 550

∴ x(47 - x) = 550

47xx2=550x247x+550=0x225x22x+550=0x(x25)22(x25)=0(x22)(x25)=0x22=0 or x25=0x=22 or x=25.\Rightarrow 47x - x^2 = 550 \\[1em] \Rightarrow x^2 - 47x + 550 = 0 \\[1em] \Rightarrow x^2 - 25x - 22x + 550 = 0 \\[1em] \Rightarrow x(x - 25) - 22(x - 25) = 0 \\[1em] \Rightarrow (x - 22)(x - 25) = 0 \\[1em] \Rightarrow x - 22 = 0 \text{ or } x - 25 = 0 \\[1em] x = 22 \text{ or } x = 25.

Vivek's age = 25 years and Amit's age = 22 years.

Answered By

12 Likes


Related Questions