Min and Glen started running together along a cross country track. When Glen completed the track in 28 minutes, Min had run only
35 of the track. Min’s average speed was 106 m/min slower than Glen’s.
- How long was the cross country track in m?
- Find Min’s average speed in m/min.
(a)
When Glen completed the track:
Glen's distance = 5 u
Min's distance = 3 u
Extra distance covered by Glen
= 5 u - 3 u
= 2 u
2 u = 106 x 28
2 u = 2968
1 u = 2968 ÷ 2 = 1484
Distance of the cross country track
= 5 u
= 5 x 1484
= 7420 m
(b)
Glen's speed
= 7420 ÷ 28
= 265 m/min
Min's speed
= 265 - 106
= 159 m/min
Answer(s): (a) 7420 m; (b) 159 m/min