Daniel's age is
15 of his uncle's. His uncle will be 39 years old in 4 years' time. In how many years' time will Daniel's age be
57 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
5 u |
28 |
Change |
+ 4 |
+ 4 |
|
After |
|
39 |
|
His uncle's current age
= 39 - 4
= 35
5 u = 35
1 u = 35 ÷ 5 = 7
Daniel's current age = 7
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 7
= 28
|
Daniel |
His uncle |
Difference |
Before |
1 u |
5 u |
28 |
Change |
+ ? |
+ ? |
|
After |
5 p |
7 p |
2 p |
2 p = 28
1 p = 28 ÷ 2 = 14
Daniel's age when he will be
57 of his uncle's age
= 5 p
= 5 x 14
= 70
Number of years' time when Daniel's age will be
57 of his uncle's age
= 5 p - 1 u
= 70 - 14
= 56
Answer(s): 56