Question
Sarah and Ken have a bicycle race. Sarah cycles at a speed of 20 km/h. Ken cycles at a speed of 25 km/h. If Ken lets Sarah start 45 min before him, how long will Ken take to catch up with Sarah?
3 m

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Sarah and Ken have a bicycle race. Sarah cycles at a speed of 20 km/h. Ken cycles at a speed of 25 km/h. If Ken lets Sarah start 45 min before him, how long will Ken take to catch up with Sarah?