When Mr Seth is 46 years old, his nephew is 10 years old. In how many years will he be 4 times as old as his nephew?
|
Mr Seth |
His nephew |
Difference |
Before |
46 |
10 |
36 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
The difference in the age between Mr Seth and his nephew at first and in the end remains the same.
Difference in the age between Mr Seth and his nephew
= 4 u - 1 u
= 3 u
3 u = 46 - 10
3 u = 36
1 u = 36 ÷ 3 = 12
Number of years' time so Mr Seth will be 4 times as old as his nephew
= 12 - 10
= 2
Answer(s): 2