A non-stop bus goes from one station to another with the speed of 54 km/h. The same bus returns back with the speed of 36 km/h. Find the average speed of the bus for the entire journey.
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Step-by-step explanation:
avg. speed = 2d/(d/36 + d/54) = 2*54*36/(36 + 54) = 2*3*36/5 = 43.2 kmph.
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