The ratio of Pierre's age to Simon's age is 2 : 1. Last year, their average age was 14. How old will Simon be in 10 years' time?
| |
Pierre |
Simon |
Total |
| Before |
2 u - 1 |
1 u - 1 |
28 |
| Change |
+ 1 |
+ 1 |
|
| After |
2 u |
1 u |
30 |
Total age of Pierre and Simon this year
= 2 u + 1 u
= 3 u
Total age of Pierre and Simon this year
= 2 x 14 + 1 + 1
= 28 + 2
= 30
3 u = 30
1 u = 30 ÷ 3 = 10
Simon's age in 10 years' time
= 1 u + 10
= 1 x 10 + 10
= 10 + 10
= 20
Answer(s): 20
