The ratio of Ryan's age to Fabian's age is 5 : 4. Last year, their average age was 17. How old will Fabian be in 11 years' time?
| |
Ryan |
Fabian |
Total |
| Before |
5 u - 1 |
4 u - 1 |
34 |
| Change |
+ 1 |
+ 1 |
|
| After |
5 u |
4 u |
36 |
Total age of Ryan and Fabian this year
= 5 u + 4 u
= 9 u
Total age of Ryan and Fabian this year
= 2 x 17 + 1 + 1
= 34 + 2
= 36
9 u = 36
1 u = 36 ÷ 9 = 4
Fabian's age in 11 years' time
= 4 u + 11
= 4 x 4 + 11
= 16 + 11
= 27
Answer(s): 27
