Question
Yoko and Sam have a bicycle race. Yoko cycles at a speed of 15 km/h. Sam cycles at a speed of 17 km/h. If Sam lets Yoko start 40 min before him, how long will Sam take to catch up with Yoko?
3 m

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Yoko and Sam have a bicycle race. Yoko cycles at a speed of 15 km/h. Sam cycles at a speed of 17 km/h. If Sam lets Yoko start 40 min before him, how long will Sam take to catch up with Yoko?