When Mr Ethan is 38 years old, his cousin is 2 years old. In how many years will he be 3 times as old as his cousin?
|
Mr Ethan |
His cousin |
Difference |
Before |
38 |
2 |
36 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
The difference in the age between Mr Ethan and his cousin at first and in the end remains the same.
Difference in the age between Mr Ethan and his cousin
= 3 u - 1 u
= 2 u
2 u = 38 - 2
2 u = 36
1 u = 36 ÷ 2 = 18
Number of years' time so Mr Ethan will be 3 times as old as his cousin
= 18 - 2
= 16
Answer(s): 16