At 12 53, Shiyun cycled from the grocery store towards the library while Eva cycled from the library towards the grocery store. At 13 13, the two cyclists passed each other. 15 minutes later, Shiyun reached library but Eva was 1080 m from the grocery store.
- At what combined speed were the two cyclists approaching each other?
- Find the distance between the library and the grocery store in km.
(a)
From 12 53 to 13 13 = 20 min
Combined speed of the two cyclists
= 1080 ÷ (20 - 15)
= 216 m/min
(b)
Distance between the library and the grocery store
= 20 x 216
= 4320 m
1000 m = 1 km
4320 m = 4.32 km
Distance between the library and the grocery store = 4.32 km
Answer(s): (a) 216 m/min; (b) 4.32 km