The ratio of Vaidev's age to Eric's age is 4 : 3. Next year, their average age will be 15. How old will Vaidev be in 8 years' time?
| |
Vaidev |
Eric |
Total |
| Before |
4 u |
3 u |
28 |
| Change |
+ 1 |
+ 1 |
|
| After |
4 u + 1 |
3 u + 1 |
30 |
Total age of Vaidev and Eric this year
= 4 u + 3 u
= 7 u
Total age of Vaidev and Eric this year
= 2 x 15 - 1 - 1
= 30 - 2
= 28
7 u = 28
1 u = 28 ÷ 7 = 4
Vaidev's age in 8 years' time
= 4 u + 8
= 4 x 4 + 8
= 16 + 8
= 24
Answer(s): 24
