Seth is
d years old. Ethan is six times as old as Seth and Julian is 5 years younger than Ethan.
- Express Julian's age in terms of d.
- Seth is 10 years old as of now. ln how many years' time will Julian be 4 times as old as Seth?
(a)
Seth's age =
d years
Ethan's age = 6
d years
Julian's age = (6
d - 5) years
(b)
d = 10
Difference in age remains unchanged.
Difference in age between Julian and Seth
= (6
d - 5) -
d = 6
d -
d - 5
= 5
d - 5
= 5 x 10 - 5
= 45 years
Difference in the age when Julian will be 4 times as old as Seth
= 4 u - 1 u
= 3 u
3 u = 45
1 u = 45 ÷ 3 = 15
Number of years' time so Julian will be 4 times as old as Seth
= 15 - 10
= 5 years
Answer(s): (a) (6
d - 5) years; (b) 5 years
