A father is seven times as old as his son. After 10 years, the father will be three times as old as his son. What is the present age of the father?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 35 years
Let the son be \(s\) years old, so the father is \(7s\). After 10 years both are 10 years older.
\(7s+10=3(s+10)\)
\(7s+10=3s+30\), so \(4s=20\) and \(s=5\)
Father’s present age \(=7\times5=35\) years