Question
Xandra and Daniel have a bicycle race. Xandra cycles at a speed of 15 km/h. Daniel cycles at a speed of 18 km/h. If Daniel lets Xandra start 36 min before him, how long will Daniel take to catch up with Xandra?
3 m

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Xandra and Daniel have a bicycle race. Xandra cycles at a speed of 15 km/h. Daniel cycles at a speed of 18 km/h. If Daniel lets Xandra start 36 min before him, how long will Daniel take to catch up with Xandra?