The ratio of Rahul’s age and his son Aman’s age is 9 : 1 and the product of their ages
is 144. What will be the sum of their ages after four years?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 48.
Let the age of Rahul and his son be 9x and x
According to the question,
⇒ 9x × x = 144
⇒ 9x2 = 144
⇒ x2 = 16
⇒ x = 4
Sum of their present age = 9x + x = 10x = 40
After four years = 40 + 8 = 48 years