Question

The T.V. transmission tower in Delhi has a height of $240\text{m}$. The distance up to which that the broadcast can be received, (taking the radius of earth to be $6.4\times {10}^6\text{m}$) is :-

• A. $100\text{km}$
• B. $60\text{km}$
• C. $55\text{km}$
• D. $50\text{km}$

Answer 1

The correct option is C $55\text{km}$

$D=\sqrt{2Rh}=\sqrt{2\times 6.4\times {10}^6\times 240}=55\text{km}$