Question
Nora and David have a bicycle race. Nora cycles at a speed of 15 km/h. David cycles at a speed of 24 km/h. If David lets Nora start 36 min before him, how long will David take to catch up with Nora?
3 m

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Nora and David have a bicycle race. Nora cycles at a speed of 15 km/h. David cycles at a speed of 24 km/h. If David lets Nora start 36 min before him, how long will David take to catch up with Nora?