Daniel's age is
19 of his uncle's. His uncle will be 72 years old in 9 years' time. In how many years' time will Daniel's age be
37 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
9 u |
56 |
Change |
+ 9 |
+ 9 |
|
After |
|
72 |
|
His uncle's current age
= 72 - 9
= 63
9 u = 63
1 u = 63 ÷ 9 = 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
= 9 u - 1 u
= 8 u
= 8 x 7
= 56
|
Daniel |
His uncle |
Difference |
Before |
1 u |
9 u |
56 |
Change |
+ ? |
+ ? |
|
After |
3 p |
7 p |
4 p |
4 p = 56
1 p = 56 ÷ 4 = 14
Daniel's age when he will be
37 of his uncle's age
= 3 p
= 3 x 14
= 42
Number of years' time when Daniel's age will be
37 of his uncle's age
= 3 p - 1 u
= 42 - 14
= 28
Answer(s): 28