The ratio of Ian's age to Andy's age is 2 : 1. Last year, their average age was 14. How old will Andy be in 3 years' time?
|
Ian |
Andy |
Total |
Before |
2 u - 1 |
1 u - 1 |
28 |
Change |
+ 1 |
+ 1 |
|
After |
2 u |
1 u |
30 |
Total age of Ian and Andy this year
= 2 u + 1 u
= 3 u
Total age of Ian and Andy this year
= 2 x 14 + 1 + 1
= 28 + 2
= 30
3 u = 30
1 u = 30 ÷ 3 = 10
Andy's age in 3 years' time
= 1 u + 3
= 1 x 10 + 3
= 10 + 3
= 13
Answer(s): 13