Question
Sarah and Ahmad have a bicycle race. Sarah cycles at a speed of 16 km/h. Ahmad cycles at a speed of 20 km/h. If Ahmad lets Sarah start 30 min before him, how long will Ahmad take to catch up with Sarah?
3 m

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Sarah and Ahmad have a bicycle race. Sarah cycles at a speed of 16 km/h. Ahmad cycles at a speed of 20 km/h. If Ahmad lets Sarah start 30 min before him, how long will Ahmad take to catch up with Sarah?