Lynn and Andy started running together along a cross country track. When Andy completed the track in 43 minutes, Lynn had run only
35 of the track. Lynn’s average speed was 104 m/min slower than Andy’s.
- How long was the cross country track in m?
- Find Lynn’s average speed in m/min.
(a)
When Andy completed the track:
Andy's distance = 5 u
Lynn's distance = 3 u
Extra distance covered by Andy
= 5 u - 3 u
= 2 u
2 u = 104 x 43
2 u = 4472
1 u = 4472 ÷ 2 = 2236
Distance of the cross country track
= 5 u
= 5 x 2236
= 11180 m
(b)
Andy's speed
= 11180 ÷ 43
= 260 m/min
Lynn's speed
= 260 - 104
= 156 m/min
Answer(s): (a) 11180 m; (b) 156 m/min