Question
Julie and Fred have a bicycle race. Julie cycles at a speed of 15 km/h. Fred cycles at a speed of 21 km/h. If Fred lets Julie start 48 min before him, how long will Fred take to catch up with Julie?
3 m

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Julie and Fred have a bicycle race. Julie cycles at a speed of 15 km/h. Fred cycles at a speed of 21 km/h. If Fred lets Julie start 48 min before him, how long will Fred take to catch up with Julie?