The $T.V.$ transmission tower in Delhi has a height of $245 \ m$. The distance up to which the broadcast can be received (taking the radius of the earth to be $6.4 \times 10^6 \ m$) is .......... $km$.

  • A
    $100$
  • B
    $60$
  • C
    $56$
  • D
    $50$

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