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At 9:00 on Saturday morning, two bicyclists heading in opposite directions pass each other on a bicycle path. The bicyclist heading North is riding 4km/hour faster than the bicyclist heading South. At 10:15, they are 40 km apart. Find the two bicyclists' rates.

User Max Sinev
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so it took an hour an 15 minutes which means the distance traveled is their speed+1/4 of their speed, also any answers that have northbound going faster than 6km/h above south is not right so B and D seems to be out of the picture.

User Matt Brody
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