Five years ago, the age of John was 5 times that of his son. After 5 years, his age will be 3 times that of his son. After how many years, will he be twice as old as his son?
15 years
Incorrect Answer30 years
Incorrect Answer35 years
Incorrect AnswerExplanation:
Let the present age of John be x and that of his son be y,
Forming equations,
x – 5 = 5(y – 5)
x + 5 = 3(y + 5)
After soving we get,
x = 55 and y = 15
After how many years, he will be twice as old as son,
55 + x = 2 (15 + x)
x = 25 years
The answer can be found by trying options
= (55 + 25) /(15 + 25) = 2
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By: Amit Kumar