The ratio of Charlie's age to Seth's age is 10 : 3. Next year, their average age will be 14. How old will Charlie be in 4 years' time?
| |
Charlie |
Seth |
Total |
| Before |
10 u |
3 u |
26 |
| Change |
+ 1 |
+ 1 |
|
| After |
10 u + 1 |
3 u + 1 |
28 |
Total age of Charlie and Seth this year
= 10 u + 3 u
= 13 u
Total age of Charlie and Seth this year
= 2 x 14 - 1 - 1
= 28 - 2
= 26
13 u = 26
1 u = 26 ÷ 13 = 2
Charlie's age in 4 years' time
= 10 u + 4
= 10 x 2 + 4
= 20 + 4
= 24
Answer(s): 24
