Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 12 (Q.No. 40)
40.
A person of height 1.65 m standing on a cliff of height 20 m above the water level on sea-shore can sight a ship at a distance of about
10 km
18 km
30 km
40 km
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Thomas said:   4 years ago
Use Distance=3.855 √(h);
h = 20+1.65.

Pops said:   8 years ago
Here, (sin(20+1.65))/2 = 18.44km.

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