Question
Lucy and Nick have a bicycle race. Lucy cycles at a speed of 14 km/h. Nick cycles at a speed of 21 km/h. If Nick lets Lucy start 30 min before him, how long will Nick take to catch up with Lucy?
3 m

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Lucy and Nick have a bicycle race. Lucy cycles at a speed of 14 km/h. Nick cycles at a speed of 21 km/h. If Nick lets Lucy start 30 min before him, how long will Nick take to catch up with Lucy?