The ratio of Ahmad's age to Archie's age is 7 : 1. Last year, their average age was 19. How old will Archie be in 6 years' time?
| |
Ahmad |
Archie |
Total |
| Before |
7 u - 1 |
1 u - 1 |
38 |
| Change |
+ 1 |
+ 1 |
|
| After |
7 u |
1 u |
40 |
Total age of Ahmad and Archie this year
= 7 u + 1 u
= 8 u
Total age of Ahmad and Archie this year
= 2 x 19 + 1 + 1
= 38 + 2
= 40
8 u = 40
1 u = 40 ÷ 8 = 5
Archie's age in 6 years' time
= 1 u + 6
= 1 x 5 + 6
= 5 + 6
= 11
Answer(s): 11
