Jen and Flynn started running together along a cross country track. When Flynn completed the track in 48 minutes, Jen had run only
47 of the track. Jen’s average speed was 114 m/min slower than Flynn’s.
- How long was the cross country track in m?
- Find Jen’s average speed in m/min.
(a)
When Flynn completed the track:
Flynn's distance = 7 u
Jen's distance = 4 u
Extra distance covered by Flynn
= 7 u - 4 u
= 3 u
3 u = 114 x 48
3 u = 5472
1 u = 5472 ÷ 3 = 1824
Distance of the cross country track
= 7 u
= 7 x 1824
= 12768 m
(b)
Flynn's speed
= 12768 ÷ 48
= 266 m/min
Jen's speed
= 266 - 114
= 152 m/min
Answer(s): (a) 12768 m; (b) 152 m/min