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

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