JAMB Mathematics 2020 Objective — Question 26
Question 26 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2020 Objective paper, with the correct answer and a full explanation.
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A father was 3times as old as his son five years ago. Now, the sum of their ages is 110. Determine the present age of the father.
- A. 25yrs
- B. 80yrsCorrect
- C. 75yrs
- D. 30yrs
Explanation
x+y=110. Five years ago: x-5=3(y-5). Solving: x-3y=-10, and y=110-x, giving x-3(110-x)=-10, 4x=320, x=80 years.
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