Seth is
z years old. Justin is five times as old as Seth and Vaidev is 4 years younger than Justin.
- Express Vaidev's age in terms of z.
- Seth is 8 years old as of now. ln how many years' time will Vaidev be 3 times as old as Seth?
(a)
Seth's age =
z years
Justin's age = 5
z years
Vaidev's age = (5
z - 4) years
(b)
z = 8
Difference in age remains unchanged.
Difference in age between Vaidev and Seth
= (5
z - 4) -
z = 5
z -
z - 4
= 4
z - 4
= 4 x 8 - 4
= 28 years
Difference in the age when Vaidev will be 3 times as old as Seth
= 3 u - 1 u
= 2 u
2 u = 28
1 u = 28 ÷ 2 = 14
Number of years' time so Vaidev will be 3 times as old as Seth
= 14 - 8
= 6 years
Answer(s): (a) (5
z - 4) years; (b) 6 years
