कंचन डै्स को रंगती है उसने 30 ड्रेस रंगनी है उसने अब तक 20 ली इसकी बिन बताओ
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The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. ... Velocity is a physical vector quantity; both magnitude and direction are needed to define it.
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