The ratio of Jenson's age to Asher's age is 7 : 4. Last year, their average age was 21. How old will Asher be in 10 years' time?
| |
Jenson |
Asher |
Total |
| Before |
7 u - 1 |
4 u - 1 |
42 |
| Change |
+ 1 |
+ 1 |
|
| After |
7 u |
4 u |
44 |
Total age of Jenson and Asher this year
= 7 u + 4 u
= 11 u
Total age of Jenson and Asher this year
= 2 x 21 + 1 + 1
= 42 + 2
= 44
11 u = 44
1 u = 44 ÷ 11 = 4
Asher's age in 10 years' time
= 4 u + 10
= 4 x 4 + 10
= 16 + 10
= 26
Answer(s): 26
