Jane is 5 years old. Her uncle is 29 years old. How old will Jane be when her uncle is four times her age?
| |
Jane |
Her uncle |
Difference |
| Before |
5 |
29 |
24 |
| Change |
+ ? |
+ ? |
|
| After |
1 u |
4 u |
3 u |
The difference in the age between Jane and her uncle remains unchanged.
Difference in their age at first
= 29 - 5
= 24
Difference in their age in the end
= 4 u - 1 u
= 3 u
3 u = 24
1 u = 24 ÷ 3 = 8
Jane's age when her uncle is four times her age
= 1 u
= 8
Answer(s): 8
