To double the covering range of a TV transmittion tower, its height should be multiplied by:
Question:

To double the covering range of a TV transmittion tower, its height should be multiplied by:

  1. (1) $\frac{1}{\sqrt{2}}$

  2. (2) 2

  3. (3) 4

  4. (4) $\sqrt{2}$


Correct Option: , 3

Solution:

(3) As we know, Range $=\sqrt{2 \mathrm{hR}}$

therefore to double the range height ‘ $h$ ‘ should be 4 times.

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