Bobby is
r years old. Vaidev is six times as old as Bobby and Perry is 11 years younger than Vaidev.
- Express Perry's age in terms of r.
- Bobby is 7 years old as of now. ln how many years' time will Perry be 3 times as old as Bobby?
(a)
Bobby's age =
r years
Vaidev's age = 6
r years
Perry's age = (6
r - 11) years
(b)
r = 7
Difference in age remains unchanged.
Difference in age between Perry and Bobby
= (6
r - 11) -
r = 6
r -
r - 11
= 5
r - 11
= 5 x 7 - 11
= 24 years
Difference in the age when Perry will be 3 times as old as Bobby
= 3 u - 1 u
= 2 u
2 u = 24
1 u = 24 ÷ 2 = 12
Number of years' time so Perry will be 3 times as old as Bobby
= 12 - 7
= 5 years
Answer(s): (a) (6
r - 11) years; (b) 5 years
