A particle is moving along a straight line with constant acceleration. At the end of tenth  second its velocity becomes $20\, m/s$ and in tenth second it travels a distance of $10\, m$.  Then the acceleration of the particle will be........$m/s^2$

  • A

    $10$

  • B

    $20$

  • C

    $0.2$

  • D

    $3.8$

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