Question
Hazel and Japheth have a bicycle race. Hazel cycles at a speed of 15 km/h. Japheth cycles at a speed of 17 km/h. If Japheth lets Hazel start 40 min before him, how long will Japheth take to catch up with Hazel?
3 m

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Hazel and Japheth have a bicycle race. Hazel cycles at a speed of 15 km/h. Japheth cycles at a speed of 17 km/h. If Japheth lets Hazel start 40 min before him, how long will Japheth take to catch up with Hazel?