TS EAMCET 03 May 2019 Shift 2 Solved Paper

The transmitting antenna placed at the top of a tower has a height of 45 m from the ground. The distance between receiving and transmitting antennas is 40 km and the radius of earth is 6400 km. The minimum height (in m) at which the receiving antenna is to be placed for satisfactory communication in LOS mode, is