Joelle is 4 years old. Her aunt is 32 years old. How old will Joelle be when her aunt is five times her age?
| |
Joelle |
Her aunt |
Difference |
| Before |
4 |
32 |
28 |
| Change |
+ ? |
+ ? |
|
| After |
1 u |
5 u |
4 u |
The difference in the age between Joelle and her aunt remains unchanged.
Difference in their age at first
= 32 - 4
= 28
Difference in their age in the end
= 5 u - 1 u
= 4 u
4 u = 28
1 u = 28 ÷ 4 = 7
Joelle's age when her aunt is five times her age
= 1 u
= 7
Answer(s): 7
