what is instantaneous speed and instantaneous velocity?

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Solution

When the speed of an object varies with time, then the object possesses different speeds at different instants.The speed of an object at a given instant of time is called its instantaneous speed.
Similarly, when the velocity of an object varies with time, then the object possesses different velocities at different instants.The velocity of an object at a given instant of time is called its instantaneous velocity.

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