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COMEDK2015PhysicsCommunication System

A TV tower is 120 ~m high. How much more height is to be added to it, if its coverage range is to become double?

Options

  1. A120 ~m
  2. B240 ~m
  3. C360 ~m
  4. D480 ~m

Correct answer

C. 360 ~m

Step-by-step solution

Initial height of TV tower, h₁=120 ~m Coverage range of TV tower is given as d= 2 R h where, R is radius of the earth. aligned & d₁ d₂ = h₁ h₂ & d₁ 2 d₁ = 120 h₂ & 1 4 = 120 h₂ & h₂=480 ~m & . Heighi to be added =h₂-h₁=2 d₁ ] & =480-120=360 ~m aligned

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