Bryan is 29 years old.
Adam is 5 years old.
In a few years' time, Bryan will be 3 times as old as Adam.
- In how many years' time will Bryan be 3 times as old as Adam?
- How old will Bryan be by that time?
|
Bryan |
Adam |
Difference |
Before |
29 |
5 |
24 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
(a)
For Bryan to be 3 times as old as Adam,
Adam's age = 1 u
Bryan's age = 3 u
Difference in their age
= 3 u - 1 u
= 2 u
Age difference between Bryan and Adam
= 29 - 5
= 24
2 u = 24
1 u = 24 ÷ 2 = 12
Number of years' time when Bryan will be 3 times as old as Adam
= 12 - 5
= 7
(b)
Bryan's age in 7 years' time
= 3 u
= 3 x 12
= 36
Answer(s): (a) 7; (b) 36