A person covers half his journey by train at 60 km/h, half the remainder by bus at 30 km/h and the rest by cycle at 10 km/h. find his average speed during the entire journey.
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Let the total distance of the journey of a man = d kms
Now, the average speed of the entire journey = dd120 + d120 + d40 = 24 kmph.
average speed=total distance/total time
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