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

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