Daniel's age is
15 of his uncle's. His uncle will be 48 years old in 3 years' time. In how many years' time will Daniel's age be
47 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
5 u |
36 |
Change |
+ 3 |
+ 3 |
|
After |
|
48 |
|
His uncle's current age
= 48 - 3
= 45
5 u = 45
1 u = 45 ÷ 5 = 9
Daniel's current age = 9
The difference in the age between Daniel and his uncle remains the same.
Difference in the age between Daniel and his uncle
= 5 u - 1 u
= 4 u
= 4 x 9
= 36
|
Daniel |
His uncle |
Difference |
Before |
1 u |
5 u |
36 |
Change |
+ ? |
+ ? |
|
After |
4 p |
7 p |
3 p |
3 p = 36
1 p = 36 ÷ 3 = 12
Daniel's age when he will be
47 of his uncle's age
= 4 p
= 4 x 12
= 48
Number of years' time when Daniel's age will be
47 of his uncle's age
= 4 p - 1 u
= 48 - 12
= 36
Answer(s): 36