Question
Yoko and Henry have a bicycle race. Yoko cycles at a speed of 16 km/h. Henry cycles at a speed of 20 km/h. If Henry lets Yoko start 45 min before him, how long will Henry take to catch up with Yoko?
3 m

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Yoko and Henry have a bicycle race. Yoko cycles at a speed of 16 km/h. Henry cycles at a speed of 20 km/h. If Henry lets Yoko start 45 min before him, how long will Henry take to catch up with Yoko?