A TV tower has a height of $100\: m$. The area covered by the TV broadcast, if radius of the earth is $6400\: km$, will be:

Question

$\begin {array} {1 1} (a)\;380 \times 10^7 m^2 & \quad (b)\;402 \times 10^7 m^2 \\ (c)\;595 \times 10^7 m^2 & \quad (d)\;440 \times 10^7 m^2 \end {array}$