Mr Liam is 2 times as old as his son, Carl. 18 years ago, the ratio in the age of Mr Liam and Carl was 8 : 3. Find Carl's current age.
| |
Mr Liam |
Carl |
Difference |
| Before |
8x1 =
8 u |
3x1 =
3 u |
5x1 =
5 u |
| Change |
+ 18 |
+ 18 |
|
| After |
2x5 =
10 u |
1x5 =
5 u |
1x5 =
5 u |
The difference in the age of Mr Liam and Carl at first and in the end remains unchanged. Make the difference in age the same. LCM of 5 and 1 is 5.
The increase in the age of Mr Liam and Carl is the same.
Increase in Carl's age
= 5 u - 3 u
= 2 u
2 u = 18
1 u = 18 ÷ 2 = 9
Carl's current age
= 5 u
= 5 x 9
= 45
Answer(s): 45
