Kylie and Cody started running together along a cross country track. When Cody completed the track in 29 minutes, Kylie had run only
47 of the track. Kylie’s average speed was 96 m/min slower than Cody’s.
- How long was the cross country track in m?
- Find Kylie’s average speed in m/min.
(a)
When Cody completed the track:
Cody's distance = 7 u
Kylie's distance = 4 u
Extra distance covered by Cody
= 7 u - 4 u
= 3 u
3 u = 96 x 29
3 u = 2784
1 u = 2784 ÷ 3 = 928
Distance of the cross country track
= 7 u
= 7 x 928
= 6496 m
(b)
Cody's speed
= 6496 ÷ 29
= 224 m/min
Kylie's speed
= 224 - 96
= 128 m/min
Answer(s): (a) 6496 m; (b) 128 m/min