Question
Xuan and Rael have a bicycle race. Xuan cycles at a speed of 15 km/h. Rael cycles at a speed of 22 km/h. If Rael lets Xuan start 28 min before him, how long will Rael take to catch up with Xuan?
3 m

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Xuan and Rael have a bicycle race. Xuan cycles at a speed of 15 km/h. Rael cycles at a speed of 22 km/h. If Rael lets Xuan start 28 min before him, how long will Rael take to catch up with Xuan?