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Q.

A TV tower has a height of 150m.The area of the region covered by the TV broadcast is (Radius of earth = 6.4×106m )

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a

9.6π×108m2

b

19.2π×109m2

c

19.2π×1010m2

d

1.92π×103km2

answer is D.

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Detailed Solution

h=150m,R=6.4×106m  Distance upto which the transmission could be viewed d=2hR Total area over which transmission could be viewer =πd2=2πhR=1920π×106m2=1.92π×103km2
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