Jaslyn and Tim started running together along a cross country track. When Tim completed the track in 30 minutes, Jaslyn had run only
37 of the track. Jaslyn’s average speed was 96 m/min slower than Tim’s.
- How long was the cross country track in m?
- Find Jaslyn’s average speed in m/min.
(a)
When Tim completed the track:
Tim's distance = 7 u
Jaslyn's distance = 3 u
Extra distance covered by Tim
= 7 u - 3 u
= 4 u
4 u = 96 x 30
4 u = 2880
1 u = 2880 ÷ 4 = 720
Distance of the cross country track
= 7 u
= 7 x 720
= 5040 m
(b)
Tim's speed
= 5040 ÷ 30
= 168 m/min
Jaslyn's speed
= 168 - 96
= 72 m/min
Answer(s): (a) 5040 m; (b) 72 m/min