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Unilorin Post-UTME Mathematics 2023 (Model questions) Question 7

Question 7

Linear and Simultaneous Equations

A father is now three times as old as his son, twelve years ago, he was six times as old as his son. Calculate the present age of the father

  1. A.60
  2. B.45
  3. C.20
  4. D.88
Show the answer and explanation

Answer: A (60)

Explanation

Let the son be y, so the father is 3y. Then 3y − 12 = 6(y − 12), so 3y = 60 and y = 20. The father is 60.