Julie and Flynn started running together along a cross country track. When Flynn completed the track in 26 minutes, Julie had run only
47 of the track. Julie’s average speed was 102 m/min slower than Flynn’s.
- How long was the cross country track in m?
- Find Julie’s average speed in m/min.
(a)
When Flynn completed the track:
Flynn's distance = 7 u
Julie's distance = 4 u
Extra distance covered by Flynn
= 7 u - 4 u
= 3 u
3 u = 102 x 26
3 u = 2652
1 u = 2652 ÷ 3 = 884
Distance of the cross country track
= 7 u
= 7 x 884
= 6188 m
(b)
Flynn's speed
= 6188 ÷ 26
= 238 m/min
Julie's speed
= 238 - 102
= 136 m/min
Answer(s): (a) 6188 m; (b) 136 m/min