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

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