The average salary of $20$ workers in an office is $Rs.\, 1900$ per $month.$ If the manager's salary is added, the average becomes $Rs.\,2000$ per $month.$ The manager's annual salary (in $Rs.$) is

  • A

    $24000$

  • B

    $25200$

  • C

    $45600$

  • D

    $48000$

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