Question
Jen and Bobby have a bicycle race. Jen cycles at a speed of 15 km/h. Bobby cycles at a speed of 21 km/h. If Bobby lets Jen start 48 min before him, how long will Bobby take to catch up with Jen?
3 m

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Jen and Bobby have a bicycle race. Jen cycles at a speed of 15 km/h. Bobby cycles at a speed of 21 km/h. If Bobby lets Jen start 48 min before him, how long will Bobby take to catch up with Jen?