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Two cars cover the distance between two stations in 2 hours. The first car covers the first half of the distance at 20 kmph and the second half at 60 kmph and the second car covers the distance with uniform acceleration, starting with a velocity of 10 kmph.At what instant/instants will the two cars have the same velocity ?

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The correct Answer is:
`1/2`hr, 2`1/2`hr
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