1.

A body goes from C to D with a velocity of 20 m/s and comes back from D to C with a velocity of 30 m/s. The average velocity of the body for the whole journey is

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A body goes from C to D with a velocity of 20 m/s and comes back from D to C with a velocity of 30 m/s. The average velocity of the body for the whole journey is




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