If two triangulation signals of 6.75 m height each, are to be just visible over ground mutually, what is the maximum distance between their locations on the ground surface ?

If two triangulation signals of 6.75 m height each, are to be just vis

1.	If two triangulation signals of 6.75 m height each, are to be just visible over ground mutually, what is the maximum distance between their locations on the ground surface ?
A.	10 km
B.	20 km
C.	30 km
D.	40 km
Answer» C. 30 km

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If two triangulation signals of 6.75 m height each, are to be just visible over ground mutually, what is the maximum distance between their locations on the ground surface ?

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