SOLUTION: a man goes to a place at the rate of 4kmph.he comes back on a bicycle at 16kmph.his average speed for the entire journey.

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Question 456143: a man goes to a place at the rate of 4kmph.he comes back on a bicycle at 16kmph.his average speed for the entire journey.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Find the harmonic mean of the two rates:
2%2F%281%2F4+%2B+1%2F16%29+=+32%2F5+=+6.4kmph.