The ratio of Flynn's age to Sam's age is 2 : 1. Last year, their average age was 11. How old will Sam be in 12 years' time?
| |
Flynn |
Sam |
Total |
| Before |
2 u - 1 |
1 u - 1 |
22 |
| Change |
+ 1 |
+ 1 |
|
| After |
2 u |
1 u |
24 |
Total age of Flynn and Sam this year
= 2 u + 1 u
= 3 u
Total age of Flynn and Sam this year
= 2 x 11 + 1 + 1
= 22 + 2
= 24
3 u = 24
1 u = 24 ÷ 3 = 8
Sam's age in 12 years' time
= 1 u + 12
= 1 x 8 + 12
= 8 + 12
= 20
Answer(s): 20
