Cole is
y years old. Glen is six times as old as Cole and Ian is 4 years younger than Glen.
- Express Ian's age in terms of y.
- Cole is 4 years old as of now. ln how many years' time will Ian be 3 times as old as Cole?
(a)
Cole's age =
y years
Glen's age = 6
y years
Ian's age = (6
y - 4) years
(b)
y = 4
Difference in age remains unchanged.
Difference in age between Ian and Cole
= (6
y - 4) -
y = 6
y -
y - 4
= 5
y - 4
= 5 x 4 - 4
= 16 years
Difference in the age when Ian will be 3 times as old as Cole
= 3 u - 1 u
= 2 u
2 u = 16
1 u = 16 ÷ 2 = 8
Number of years' time so Ian will be 3 times as old as Cole
= 8 - 4
= 4 years
Answer(s): (a) (6
y - 4) years; (b) 4 years
