Question
Rachel and Glen have a bicycle race. Rachel cycles at a speed of 20 km/h. Glen cycles at a speed of 25 km/h. If Glen lets Rachel start 30 min before him, how long will Glen take to catch up with Rachel?
3 m

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Rachel and Glen have a bicycle race. Rachel cycles at a speed of 20 km/h. Glen cycles at a speed of 25 km/h. If Glen lets Rachel start 30 min before him, how long will Glen take to catch up with Rachel?