On a smooth surface, the line of sight distance between transmitting a – McqOptions

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1.	On a smooth surface, the line of sight distance between transmitting antenna (height ht metres) and receiving antenna (height hr metres) is about
A.	<img src="/_files/images/electronics-and-communication-engineering/communication-systems/508-287-1.png">
B.	<img src="/_files/images/electronics-and-communication-engineering/communication-systems/508-287-2.png">
C.	<img src="/_files/images/electronics-and-communication-engineering/communication-systems/508-287-3.png">
D.	<img src="/_files/images/electronics-and-communication-engineering/communication-systems/508-287-4.png">
Answer» E.

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