Jaslyn and Simon started running together along a cross country track. When Simon completed the track in 36 minutes, Jaslyn had run only
38 of the track. Jaslyn’s average speed was 95 m/min slower than Simon’s.
- How long was the cross country track in m?
- Find Jaslyn’s average speed in m/min.
(a)
When Simon completed the track:
Simon's distance = 8 u
Jaslyn's distance = 3 u
Extra distance covered by Simon
= 8 u - 3 u
= 5 u
5 u = 95 x 36
5 u = 3420
1 u = 3420 ÷ 5 = 684
Distance of the cross country track
= 8 u
= 8 x 684
= 5472 m
(b)
Simon's speed
= 5472 ÷ 36
= 152 m/min
Jaslyn's speed
= 152 - 95
= 57 m/min
Answer(s): (a) 5472 m; (b) 57 m/min