Glen is
r years old. Bobby is six times as old as Glen and Oliver is 10 years younger than Bobby.
- Express Oliver's age in terms of r.
- Glen is 8 years old as of now. ln how many years' time will Oliver be 3 times as old as Glen?
(a)
Glen's age =
r years
Bobby's age = 6
r years
Oliver's age = (6
r - 10) years
(b)
r = 8
Difference in age remains unchanged.
Difference in age between Oliver and Glen
= (6
r - 10) -
r = 6
r -
r - 10
= 5
r - 10
= 5 x 8 - 10
= 30 years
Difference in the age when Oliver will be 3 times as old as Glen
= 3 u - 1 u
= 2 u
2 u = 30
1 u = 30 ÷ 2 = 15
Number of years' time so Oliver will be 3 times as old as Glen
= 15 - 8
= 7 years
Answer(s): (a) (6
r - 10) years; (b) 7 years
