Physics
Physics, 19.08.2020 14:01, mayalp

During first half of a journey by a body it travel with a speed of 40km/hr and in the next half it travels with a speed of 20 km/hr .Calculate the average speed of the whole journey.

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During first half of a journey by a body it travel with a speed of 40km/hr and in the next half it t...

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