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A TV tower has a height of 100 m. How much population is covered by the TV broadcast if the average population density around the tower is 100 km−2 (radius of the earth= 6.37 × 106 m) |
4 lakh 4 billion 40,000 40 lakh |
40 lakh |
$ d = \sqrt{2hR}$ Population covered $= \pi d^2 ×$ population density $= 3.114 × ( 2 × 0.1 × 6.37 × 10^3) × 1000 ≈ 40 lakh$ |
