Engineering Board Exam Reviewer · Age Problems · medium
The sum of the ages of Peter and Paul is 21. Peter will be twice as old as Paul 3 years from now. What is the present age of Peter?
- 6
- 12
- 18
- 15
Answer
D. 15
Solution
Let x=Peter's age, y=Paul's age. x+y=21; x+3=2(y+3). Solving simultaneously gives x=15, y=6.
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