The age of a father is thrice the age of his daughter. Ten years ago, his age was five times his daughter's age. Find the present age of the father.
Answer & explanation
Correct answer: option 2
The ratio of father and son = 1 : 3
Ten years ago the age = x - 10 : 3x - 10
Actual ratio ten years ago =
\(\frac{x - 10}{3x - 10}\) = \(\frac{1}{5}\)
= 5x - 50 = 3x - 10
2x = 40
x = 20
The present age of father = 3x = 3 × 20 = 60