Question 122

John's grandfather was five times older to him 5 years ago. He would be two times of his age after 25 years from now. What is the ratio of John's age to that of his grandfather ?

Solution

Let age of john 5 years ago be x years

age of his grandfather 5 years ago will be 5x

25 years from now there ages will be x+30 and 5x+30 respectively

Given 5x+30 =2(x+30) => x=10

So there present ages would be x+5=15 and 5x+5=55

Ratio = 3:11

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