Q.

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 per sq.km. Radius of the earth 6.37×106m.  By how much height of the tower be increased to double its coverage range (in m)?

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answer is 300.

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Detailed Solution

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 h'=2d=22hRh'=4h=400m
Increase in height  =h'h=300m
 

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