Daniel's age is
17 of his uncle's. His uncle will be 40 years old in 5 years' time. In how many years' time will Daniel's age be
35 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
7 u |
30 |
Change |
+ 5 |
+ 5 |
|
After |
|
40 |
|
His uncle's current age
= 40 - 5
= 35
7 u = 35
1 u = 35 ÷ 7 = 5
Daniel's current age = 5
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 5
= 30
|
Daniel |
His uncle |
Difference |
Before |
1 u |
7 u |
30 |
Change |
+ ? |
+ ? |
|
After |
3 p |
5 p |
2 p |
2 p = 30
1 p = 30 ÷ 2 = 15
Daniel's age when he will be
35 of his uncle's age
= 3 p
= 3 x 15
= 45
Number of years' time when Daniel's age will be
35 of his uncle's age
= 3 p - 1 u
= 45 - 15
= 30
Answer(s): 30