Daniel's age is
16 of his uncle's. His uncle will be 40 years old in 4 years' time. In how many years' time will Daniel's age be
47 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
6 u |
30 |
Change |
+ 4 |
+ 4 |
|
After |
|
40 |
|
His uncle's current age
= 40 - 4
= 36
6 u = 36
1 u = 36 ÷ 6 = 6
Daniel's current age = 6
The difference in the age between Daniel and his uncle remains the same.
Difference in the age between Daniel and his uncle
= 6 u - 1 u
= 5 u
= 5 x 6
= 30
|
Daniel |
His uncle |
Difference |
Before |
1 u |
6 u |
30 |
Change |
+ ? |
+ ? |
|
After |
4 p |
7 p |
3 p |
3 p = 30
1 p = 30 ÷ 3 = 10
Daniel's age when he will be
47 of his uncle's age
= 4 p
= 4 x 10
= 40
Number of years' time when Daniel's age will be
47 of his uncle's age
= 4 p - 1 u
= 40 - 10
= 30
Answer(s): 30