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# A transmitting antenna at the top of a tower has a height 32 m and the height of the receiving antenna is 50 m .What is the maximum distance between them for satisfactory communication in line of sight (LOS) mode ?

$(a)\;55.4\;km\qquad(b)\;45.5\;km\qquad(c)\;54.5\;km\qquad(d)\;455\;km$