The ratio of Oscar's age to Michael's age is 4 : 3. Last year, their average age was 13. How old will Michael be in 7 years' time?
| |
Oscar |
Michael |
Total |
| Before |
4 u - 1 |
3 u - 1 |
26 |
| Change |
+ 1 |
+ 1 |
|
| After |
4 u |
3 u |
28 |
Total age of Oscar and Michael this year
= 4 u + 3 u
= 7 u
Total age of Oscar and Michael this year
= 2 x 13 + 1 + 1
= 26 + 2
= 28
7 u = 28
1 u = 28 ÷ 7 = 4
Michael's age in 7 years' time
= 3 u + 7
= 3 x 4 + 7
= 12 + 7
= 19
Answer(s): 19
