In a circle with radius $30\,cm ,$ a minor arc subtends an angle of measure $60$ at the centre. Then, the area of the minor sector formed by that arc is $\ldots \ldots \ldots \ldots$ $cm ^{2}$.   $(\pi=3.14)$

  • A

    $471$

  • B

    $628$

  • C

    $1256$

  • D

    $942$

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