# 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.