Question
Wendy and Luke have a bicycle race. Wendy cycles at a speed of 18 km/h. Luke cycles at a speed of 21 km/h. If Luke lets Wendy start 50 min before him, how long will Luke take to catch up with Wendy?
3 m

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Wendy and Luke have a bicycle race. Wendy cycles at a speed of 18 km/h. Luke cycles at a speed of 21 km/h. If Luke lets Wendy start 50 min before him, how long will Luke take to catch up with Wendy?