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Question

A TV transmitting antena is 80 m tall .if the receiving antena is on ground.The service are is

A
12πsqkm
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B
144πsqkm
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C
1024πsqkm
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D
32πsqkm
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Solution

The correct option is C 1024πsqkm
given,
Height of antena h=80m
R=6.4×106m
d=2Rh
A=πd
=π2Rh
=π×2×6.4×106×80
=1024π×106m2
=1024πKm2
Hence,
option (c) is correct answer.

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