The ratio of Ryan's age to Tim's age is 2 : 1. Next year, their average age will be 13. How old will Ryan be in 5 years' time?
| |
Ryan |
Tim |
Total |
| Before |
2 u |
1 u |
24 |
| Change |
+ 1 |
+ 1 |
|
| After |
2 u + 1 |
1 u + 1 |
26 |
Total age of Ryan and Tim this year
= 2 u + 1 u
= 3 u
Total age of Ryan and Tim this year
= 2 x 13 - 1 - 1
= 26 - 2
= 24
3 u = 24
1 u = 24 ÷ 3 = 8
Ryan's age in 5 years' time
= 2 u + 5
= 2 x 8 + 5
= 16 + 5
= 21
Answer(s): 21
