Question
Dana and Archie have a bicycle race. Dana cycles at a speed of 15 km/h. Archie cycles at a speed of 17 km/h. If Archie lets Dana start 40 min before him, how long will Archie take to catch up with Dana?
3 m

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Dana and Archie have a bicycle race. Dana cycles at a speed of 15 km/h. Archie cycles at a speed of 17 km/h. If Archie lets Dana start 40 min before him, how long will Archie take to catch up with Dana?