Correct Answer - Option 3 :
\(\rm \sqrt{36 /0.06735} \ km\)
Concepts:
Distance to Visible Horizon is given as:
H = 0.0673 × D2
Where
D is the distance between object and light house/tower in Kms
H is the height of tower or Lighthouse in m.
Calculation:
Given: H = 36 m
36 = 0.0673 × D2
∴ \(D = \sqrt {\frac{36}{0.0673}} \)Km