The ratio of Andy's age to Asher's age is 10 : 1. Next year, their average age will be 12. How old will Andy be in 8 years' time?
| |
Andy |
Asher |
Total |
| Before |
10 u |
1 u |
22 |
| Change |
+ 1 |
+ 1 |
|
| After |
10 u + 1 |
1 u + 1 |
24 |
Total age of Andy and Asher this year
= 10 u + 1 u
= 11 u
Total age of Andy and Asher this year
= 2 x 12 - 1 - 1
= 24 - 2
= 22
11 u = 22
1 u = 22 ÷ 11 = 2
Andy's age in 8 years' time
= 10 u + 8
= 10 x 2 + 8
= 20 + 8
= 28
Answer(s): 28
