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a particle tarvels first X meter with speed V m/s; next 2x m with speed 2v m/s; next 3x m with speed 3vm/s. the average speed of particle is?
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The total distance = X + 2X + 3X = 6X.
The total time = = = .
The average speed = = = 2V.
Answer. The average speed is 2V.