Question
Marion and Carl have a bicycle race. Marion cycles at a speed of 18 km/h. Carl cycles at a speed of 21 km/h. If Carl lets Marion start 50 min before him, how long will Carl take to catch up with Marion?
3 m

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Marion and Carl have a bicycle race. Marion cycles at a speed of 18 km/h. Carl cycles at a speed of 21 km/h. If Carl lets Marion start 50 min before him, how long will Carl take to catch up with Marion?