Q67. A captain in a vessel 0.015 km above the sea level observes a 150 m tall light house on a port just above the horizon. The distance of the vessel from the port is (A) 47.2 km (C) 49.5 km (B) 62.1 km (D) 636.2 km
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The observation is made such that the lighthouse is "just above the horizon". This implies that the line of sight from the observer to the top of the lighthouse is tangent to the Earth's surface at some point. We can use the formula for the distance to the Show more…
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