Question
Lucy and Ryan have a bicycle race. Lucy cycles at a speed of 20 km/h. Ryan cycles at a speed of 25 km/h. If Ryan lets Lucy start 30 min before him, how long will Ryan take to catch up with Lucy?
3 m

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Lucy and Ryan have a bicycle race. Lucy cycles at a speed of 20 km/h. Ryan cycles at a speed of 25 km/h. If Ryan lets Lucy start 30 min before him, how long will Ryan take to catch up with Lucy?