Civil Engineering > GATE 2017 SET-2 > Surveying
An observer standing on the deck of a ship just sees the top of a lighthouse. The top of the lighthouse is 40 m above the sea level and the height of the observer's eye is 5 m above the sea level. The distance (in km, up to one decimal place) of the observer from the lighthouse is _______.
Correct : 32.5 to 33.5
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