Maximum height reached by an object projected perpendicular to the surface of the earth with a speed equal to $50\%$ of the escape velocity from earth surface is - ( $R =$ Radius of Earth)

  • A

    $\frac {R}{2}$

  • B

    $\frac {16R}{9}$

  • C

    $\frac {R}{3}$

  • D

    $\frac {R}{8}$

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