$A$ $T$.$V$. tower has a height of $100 \, m$. The average population density around the tower is $1000 \, km^{-2}$ and the radius of the earth is $6.37 \times 10^6 \, m$. The population covered is

  • A
    $4 \times 10^6$
  • B
    $6 \times 10^4$
  • C
    $16 \times 10^4$
  • D
    $8 \times 10^6$

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