Question
Tammy and Owen have a bicycle race. Tammy cycles at a speed of 18 km/h. Owen cycles at a speed of 21 km/h. If Owen lets Tammy start 30 min before him, how long will Owen take to catch up with Tammy?
3 m

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Tammy and Owen have a bicycle race. Tammy cycles at a speed of 18 km/h. Owen cycles at a speed of 21 km/h. If Owen lets Tammy start 30 min before him, how long will Owen take to catch up with Tammy?