When Mr Elijah is 36 years old, his cousin is 6 years old. In how many years will he be 4 times as old as his cousin?
| |
Mr Elijah |
His cousin |
Difference |
| Before |
36 |
6 |
30 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Mr Elijah and his cousin at first and in the end remains the same.
Difference in the age between Mr Elijah and his cousin
= 4 u - 1 u
= 3 u
3 u = 36 - 6
3 u = 30
1 u = 30 ÷ 3 = 10
Number of years' time so Mr Elijah will be 4 times as old as his cousin
= 10 - 6
= 4
Answer(s): 4
