Bryan is 39 years old.
Adam is 6 years old.
In a few years' time, Bryan will be 4 times as old as Adam.
- In how many years' time will Bryan be 4 times as old as Adam?
- How old will Bryan be by that time?
|
Bryan |
Adam |
Difference |
Before |
39 |
6 |
33 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
(a)
For Bryan to be 4 times as old as Adam,
Adam's age = 1 u
Bryan's age = 4 u
Difference in their age
= 4 u - 1 u
= 3 u
Age difference between Bryan and Adam
= 39 - 6
= 33
3 u = 33
1 u = 33 ÷ 3 = 11
Number of years' time when Bryan will be 4 times as old as Adam
= 11 - 6
= 5
(b)
Bryan's age in 5 years' time
= 4 u
= 4 x 11
= 44
Answer(s): (a) 5; (b) 44