1.

particle moves from one point to another. If the first half of its journey is travel with speed 30 km per hour with what speed it moves the remaining journey such that total average speed of journey 90 kilometre per hour

Answer» particle moves from one point to another. If the first half of its journey is travel with speed 30 km per hour with what speed it moves the remaining journey such that total average speed of journey 90 kilometre per hour


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