The ratio of Valen's age to Justin's age is 2 : 1. Next year, their average age will be 13. How old will Valen be in 11 years' time?
| |
Valen |
Justin |
Total |
| Before |
2 u |
1 u |
24 |
| Change |
+ 1 |
+ 1 |
|
| After |
2 u + 1 |
1 u + 1 |
26 |
Total age of Valen and Justin this year
= 2 u + 1 u
= 3 u
Total age of Valen and Justin this year
= 2 x 13 - 1 - 1
= 26 - 2
= 24
3 u = 24
1 u = 24 ÷ 3 = 8
Valen's age in 11 years' time
= 2 u + 11
= 2 x 8 + 11
= 16 + 11
= 27
Answer(s): 27
