Question
Wendy and Fred have a bicycle race. Wendy cycles at a speed of 20 km/h. Fred cycles at a speed of 22 km/h. If Fred lets Wendy start 30 min before him, how long will Fred take to catch up with Wendy?
3 m

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Wendy and Fred have a bicycle race. Wendy cycles at a speed of 20 km/h. Fred cycles at a speed of 22 km/h. If Fred lets Wendy start 30 min before him, how long will Fred take to catch up with Wendy?