Min and Cody started running together along a cross country track. When Cody completed the track in 25 minutes, Min had run only
59 of the track. Min’s average speed was 100 m/min slower than Cody’s.
- How long was the cross country track in m?
- Find Min’s average speed in m/min.
(a)
When Cody completed the track:
Cody's distance = 9 u
Min's distance = 5 u
Extra distance covered by Cody
= 9 u - 5 u
= 4 u
4 u = 100 x 25
4 u = 2500
1 u = 2500 ÷ 4 = 625
Distance of the cross country track
= 9 u
= 9 x 625
= 5625 m
(b)
Cody's speed
= 5625 ÷ 25
= 225 m/min
Min's speed
= 225 - 100
= 125 m/min
Answer(s): (a) 5625 m; (b) 125 m/min