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Time, Distance and Speed

A vehicle travels 240 km in 3 hours and then 180 km in 2 hours. What is the average speed for the entire journey?

Answer: C. 72 km/h
Total distance = 240 km + 180 km = 420 km. Total time = 3 hours + 2 hours = 5 hours. Average speed = 420 km / 5 hours = 84 km/h.
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