Question
Xandra and Sean have a bicycle race. Xandra cycles at a speed of 20 km/h. Sean cycles at a speed of 23 km/h. If Sean lets Xandra start 27 min before him, how long will Sean take to catch up with Xandra?
3 m

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Xandra and Sean have a bicycle race. Xandra cycles at a speed of 20 km/h. Sean cycles at a speed of 23 km/h. If Sean lets Xandra start 27 min before him, how long will Sean take to catch up with Xandra?