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Question

For VHF signal broadcasting, _____ km2 of maximum service area will be covered by an antenna tower of height 30 m, if the receiving antenna is placed on the ground.

(Let radius of the earth be 6400 km)
(Round off to the nearest integer)
(Take π as 3.14)


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Solution

We know that radius of the area covered,
r=2hR

Also, area,
A=πr2
A=π(2hR)
A=3.14×2×30×6400×103
A1206×106 m21206 km2

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