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The distance of coverage of a transmitti...

The distance of coverage of a transmitting antenna is 12 . 8 km . Then the height of the antenna is (Given that redius of earth = 6400 km)

A

`6 . 4 ` m

B

`12. 8` m

C

`3 . 2` m

D

16 m

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The correct Answer is:
B
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