The age of Japheth is
34 of Rael's age. 10 years ago, the ratio of Japheth's age to Rael's age was 4 : 7. How old is Rael now?
| |
Japheth |
Rael |
Difference |
| Before |
4 u |
7 u |
3 u |
| Change |
+ 10 |
+ 10 |
|
| After |
3x3 =
9 u |
4x3 =
12 u |
1x3 =
3 u |
The difference in the age between Japheth and Rael at first and in the end remains unchanged. Make the difference in the age between Japheth and Rael the same. LCM of 3 and 1 is 3.
Increase in Japheth's age
= 9 u - 4 u
= 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Rael's age now
= 12 u
= 12 x 2
= 24
Answer(s): 24
