X moves at a speed of 65 km/hr while Y who is behind X moves at a speed of 80 km/hr. What is the relative velocity of Y with respect to X?
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As both of them are moving in the same direction , their velocities will subtract .
velocity of X = 65km/hr ( constant )
velocity of Y = 80km/hr
therefore, the relative velocity of Y = 15km/hr
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