You start from 7:00 and drive at the speed of 80 km/hr and reach a point B where you take a break for 30 minutes. You notice you have covered 240 km by now, and drive at a speed of 120 km/hr for 3 hours constantly and reach a point where you are stuck in a traffic jam for another half an hour. Rest of the journey you cover at 70km/hr. At what time will you reach? What was the average speed of your journey?
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