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

A person of height 1.65 m standing on a cliff of height 20 m above the

1.	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
A.	10 km
B.	18 km
C.	30 km
D.	40 km
Answer» C. 30 km

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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

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