Daniel's age is
17 of his uncle's. His uncle will be 61 years old in 5 years' time. In how many years' time will Daniel's age be
25 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
7 u |
48 |
Change |
+ 5 |
+ 5 |
|
After |
|
61 |
|
His uncle's current age
= 61 - 5
= 56
7 u = 56
1 u = 56 ÷ 7 = 8
Daniel's current age = 8
The difference in the age between Daniel and his uncle remains the same.
Difference in the age between Daniel and his uncle
= 7 u - 1 u
= 6 u
= 6 x 8
= 48
|
Daniel |
His uncle |
Difference |
Before |
1 u |
7 u |
48 |
Change |
+ ? |
+ ? |
|
After |
2 p |
5 p |
3 p |
3 p = 48
1 p = 48 ÷ 3 = 16
Daniel's age when he will be
25 of his uncle's age
= 2 p
= 2 x 16
= 32
Number of years' time when Daniel's age will be
25 of his uncle's age
= 2 p - 1 u
= 32 - 16
= 16
Answer(s): 16