Surveying
The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The latitude of the place, is

40°
80°
70°
60°

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Surveying
The length of a chain is measured from

centre of one handle to centre of other handle
outside of one handle to inside of other handle
inside of one handle to inside of other handle
outside of one handle to outside of other handle

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