Question
Nora and Wesley have a bicycle race. Nora cycles at a speed of 18 km/h. Wesley cycles at a speed of 21 km/h. If Wesley lets Nora start 40 min before him, how long will Wesley take to catch up with Nora?
3 m

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Nora and Wesley have a bicycle race. Nora cycles at a speed of 18 km/h. Wesley cycles at a speed of 21 km/h. If Wesley lets Nora start 40 min before him, how long will Wesley take to catch up with Nora?