Jade and Lee started running together along a cross country track. When Lee completed the track in 47 minutes, Jade had run only
58 of the track. Jade’s average speed was 96 m/min slower than Lee’s.
- How long was the cross country track in m?
- Find Jade’s average speed in m/min.
(a)
When Lee completed the track:
Lee's distance = 8 u
Jade's distance = 5 u
Extra distance covered by Lee
= 8 u - 5 u
= 3 u
3 u = 96 x 47
3 u = 4512
1 u = 4512 ÷ 3 = 1504
Distance of the cross country track
= 8 u
= 8 x 1504
= 12032 m
(b)
Lee's speed
= 12032 ÷ 47
= 256 m/min
Jade's speed
= 256 - 96
= 160 m/min
Answer(s): (a) 12032 m; (b) 160 m/min