The age of Michael is
57 of Dylan's age. 15 years later, the ratio of Michael's age to Dylan's age is 5 : 6. How old is Dylan at first?
| |
Michael |
Dylan |
Difference |
| Before |
5 u |
7 u |
2 u |
| Change |
+ 15 |
+ 15 |
|
| After |
5x2 =
10 u |
6x2 =
12 u |
1x2 =
2 u |
The difference in the age between Michael and Dylan at first and in the end remains unchanged. Make the difference in the age between Michael and Dylan the same. LCM of 2 and 1 is 2.
Increase in Michael's age
= 10 u - 5 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Dylan's age at first
= 7 u
= 7 x 3
= 21
Answer(s): 21
