How high should a helicopter pilot rise at point A just to see the hor – McqOptions

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1.	How high should a helicopter pilot rise at point A just to see the horizon at point B, if the distance AB is 40 km?
A.	101.75 m
B.	110.50 m
C.	107.68 m
D.	105.50 m
Answer» D. 105.50 m

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