A TV tower has a height of 100m. How much population is covered by the TV broadcast if the average population density around the tower is 1000 persons per sq km?

Where R is the radius of earth , and h is the height of the tower.

Therefore Area over the earth surface where TV Broadcast reaches= ${\mathrm{\pi d}}^{2}=\mathrm{\pi}\left(2\mathrm{Rh}\right)$

Thus the population is covered by the TV broadcast =(density)(Area)= $1000\times \mathrm{\pi}\times 2\mathrm{Rh}.=1000\times 3.14\times 2\times 6378\times 0.1=4005384$

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