Fill in the blanks.
Bryan is 38 years old and
Adam is 12 years old.
- Difference in their age now = _____
- Difference in their age when Bryan is thrice the age of Adam = _____ u
- In how many years' time will Bryan be thrice the age of Adam?
- How old will Bryan be when he will be thrice the age of Adam?
|
Bryan |
Adam |
Difference |
Before |
38 |
12 |
26 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
(a)
Change X times into units.
Difference in their age
= 38 - 12
= 26
(b)
Difference in the age when Bryan is thrice the age of Adam
= 3 u - 1 u
= 2 u
(c)
2 u = 26
1 u = 26 ÷ 2 = 13
Number of years' time when Bryan will be thrice the age of Adam
= 1 u - 12
= 13 - 12
= 1
(d)
Bryan's age when he will be thrice the age of Adam
= 3 u
= 3 x 13
= 39
Answer(s): (a) 26; (b) 2; (c) 1; (d) 39