Bryan was 4 times as old as Adam 40 years ago.
Their total present age is 95 years now.
- How old is Bryan now?
- How many years is Bryan older than Adam?
- How old is Adam in 5 years' time?
| |
Bryan |
Adam |
Total |
| 40 years ago |
4 u |
1 u |
5 u |
| Change |
+ 40 |
+ 40 |
+ 80 |
| Present |
4 u + 40 |
1 u + 40 |
95 |
(a)
Total age of Bryan and Adam 40 years ago
= 95 - 80
= 15
40 years ago
Bryan's age = 4 u
Adam's age = 1 u
Total age of Bryan and Adam = 5 u
5 u + 80 = 95
5 u = 95 - 80 = 15
1 u = 15 ÷ 5 = 3
Bryan's age now
= 4 u + 40
= 4 x 3 + 40
= 12 + 40
= 52
(b)
Number of years that Bryan is older than Adam
= 4 u - 1 u
= 3 u
= 3 x 3
= 9
(c)
Adam's age in 5 years' time
= 1 u + 40 + 5
= 3 + 40 + 5
= 48
Answer(s): (a) 52; (b) 9; (c) 48
