Daniel's age is
110 of his uncle's. His uncle will be 39 years old in 9 years' time. In how many years' time will Daniel's age be
47 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
10 u |
27 |
Change |
+ 9 |
+ 9 |
|
After |
|
39 |
|
His uncle's current age
= 39 - 9
= 30
10 u = 30
1 u = 30 ÷ 10 = 3
Daniel's current age = 3
The difference in the age between Daniel and his uncle remains the same.
Difference in the age between Daniel and his uncle
= 10 u - 1 u
= 9 u
= 9 x 3
= 27
|
Daniel |
His uncle |
Difference |
Before |
1 u |
10 u |
27 |
Change |
+ ? |
+ ? |
|
After |
4 p |
7 p |
3 p |
3 p = 27
1 p = 27 ÷ 3 = 9
Daniel's age when he will be
47 of his uncle's age
= 4 p
= 4 x 9
= 36
Number of years' time when Daniel's age will be
47 of his uncle's age
= 4 p - 1 u
= 36 - 9
= 27
Answer(s): 27