The ratio of father's age to son's age is 4 : 1. The product of their age is 196. The ratio of their ages after 5 years will be?
Correct Answer: 11 : 4
Explanation:
Let their ages be 4x and x years.
∵ 4x2 = 196
∴ x2 = 49
⇒ x = 7
Their ages are 28 years and 7 years.
Ratio of their ages be after 5 years = 33 : 12 = 11 : 4.
