Zara and Wesley started running together along a cross country track. When Wesley completed the track in 44 minutes, Zara had run only
13 of the track. Zara’s average speed was 114 m/min slower than Wesley’s.
- How long was the cross country track in m?
- Find Zara’s average speed in m/min.
(a)
When Wesley completed the track:
Wesley's distance = 3 u
Zara's distance = 1 u
Extra distance covered by Wesley
= 3 u - 1 u
= 2 u
2 u = 114 x 44
2 u = 5016
1 u = 5016 ÷ 2 = 2508
Distance of the cross country track
= 3 u
= 3 x 2508
= 7524 m
(b)
Wesley's speed
= 7524 ÷ 44
= 171 m/min
Zara's speed
= 171 - 114
= 57 m/min
Answer(s): (a) 7524 m; (b) 57 m/min