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

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