The population in a particular area is 1000 per square kilometer.What should be the height of the transmission tower to cover a population of 10 lakhs. For the sake of simplicity, assume that the Radius of earth is 6,400 Km.

Question

$\begin{array}{1 1}(a)\;50m\\(b)\;75m\\(c)\;25m\\(d)\;100m\end{array}$