Vaidev is 7 years older than Riordan. 10 years ago, the sum of their age was 61. How old is Riordan now?
| |
Vaidev |
Riordan |
Difference |
Total |
| Before |
1 u + 7 |
1 u |
7 |
61 |
| Change |
+ 10 |
+ 10 |
|
+ 20 |
| After |
1 u + 17 |
1 u + 10 |
7 |
2 u + 27 |
The difference in the age between Vaidev and Riordan remains unchanged.
Riordan's current age = 1 u
Vaidev's current age = 1 u + 7
Combined age of Vaidev and Johny 10 years ago
= 1 u + 1 u + 7
= 2 u + 7
2 u + 7 = 61
2 u = 61 - 7
2 u = 54
1 u = 54 ÷ 2 = 27
Riordan's current age
= 1 u + 10
= 27 + 10
= 37
Answer(s): 37
