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