Question
Zara and John have a bicycle race. Zara cycles at a speed of 15 km/h. John cycles at a speed of 18 km/h. If John lets Zara start 36 min before him, how long will John take to catch up with Zara?
3 m

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Zara and John have a bicycle race. Zara cycles at a speed of 15 km/h. John cycles at a speed of 18 km/h. If John lets Zara start 36 min before him, how long will John take to catch up with Zara?