The height of a transmitting antenna is 225 m above the

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The height of a transmitting antenna is 225 m above the ground level. Its radio horizon will be—

1. 60 km
2. 76 km
3. 120 km
4. 225 km

Correct Option: A

Radio horizon of antenna is given by
dl = 4√h_t
= 4√225 = 60km