The ratio of Caden's age to Xavier's age is 3 : 1. Last year, their average age was 21. How old will Xavier be in 5 years' time?
| |
Caden |
Xavier |
Total |
| Before |
3 u - 1 |
1 u - 1 |
42 |
| Change |
+ 1 |
+ 1 |
|
| After |
3 u |
1 u |
44 |
Total age of Caden and Xavier this year
= 3 u + 1 u
= 4 u
Total age of Caden and Xavier this year
= 2 x 21 + 1 + 1
= 42 + 2
= 44
4 u = 44
1 u = 44 ÷ 4 = 11
Xavier's age in 5 years' time
= 1 u + 5
= 1 x 11 + 5
= 11 + 5
= 16
Answer(s): 16
