Ivan is
w years old. Will is five times as old as Ivan and Zane is 4 years younger than Will.
- Express Zane's age in terms of w.
- Ivan is 4 years old as of now. ln how many years' time will Zane be 3 times as old as Ivan?
(a)
Ivan's age =
w years
Will's age = 5
w years
Zane's age = (5
w - 4) years
(b)
w = 4
Difference in age remains unchanged.
Difference in age between Zane and Ivan
= (5
w - 4) -
w = 5
w -
w - 4
= 4
w - 4
= 4 x 4 - 4
= 12 years
Difference in the age when Zane will be 3 times as old as Ivan
= 3 u - 1 u
= 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Number of years' time so Zane will be 3 times as old as Ivan
= 6 - 4
= 2 years
Answer(s): (a) (5
w - 4) years; (b) 2 years
