Train is moving towards east with a speed of 20 metre per second a person is running on the roof of the train with a speed of 3 metre per second against the motion of the train velocity of the person as seen by an observer will be
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A train is moving towards East with a speed 20 m/s. A person is running on the roof of the train with a speed 3 m/s against the motion of train. Velocity of the person as seen by an observer on ground will be :
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