SOLUTION: at 9:oo am on satuday morning to bicyclists heading in the opposite directions pass eachother on a path. the bike going north is riding 4km/h faster then the bike going south. At 1

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Question 910676: at 9:oo am on satuday morning to bicyclists heading in the opposite directions pass eachother on a path. the bike going north is riding 4km/h faster then the bike going south. At 10:30 am, they are 39 km/h apart. Find the bike rates.
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
Let d be the distance between their starting locations. Travel time was 1%261%2F2 hours.

___________________speed__________time__________distance
Bicyclist__________r+4_______________3%2F2________%28r%2B4%29%283%2F2%29
Otherbicyclist______r________________3%2F2________r%283%2F2%29
REMAINING_________________________________________d-%28r%2B4%29%283%2F2%29-r%283%2F2%29=39

The information appears not enough.

These bicyclists' rate of approach is (r+4)+r=2r%2B4.
Distance traveled for both of them combined, %282r%2B4%29%283%2F2%29.
d and r both remain unknown. d-%282r%2B4%29%283%2F2%29=39.