Question
Xandra and Ryan have a bicycle race. Xandra cycles at a speed of 15 km/h. Ryan cycles at a speed of 25 km/h. If Ryan lets Xandra start 40 min before him, how long will Ryan take to catch up with Xandra?
3 m

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Xandra and Ryan have a bicycle race. Xandra cycles at a speed of 15 km/h. Ryan cycles at a speed of 25 km/h. If Ryan lets Xandra start 40 min before him, how long will Ryan take to catch up with Xandra?