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A scooterist goes to a place at a speed of 20 km/hr and returns from there at a speed of 30 km
the average speed in km/hr for the entire journey.
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Speed from A to B = 20km/hr ———(1)
Speed from B to A = 30km/hr ———(2)
Average speed = [(1) + (2)] /2
Average speed = [20 + 30]/2
Average speed = 25 km/hr