Question: A line AB , 2 0 0 0 m long, lying at an elevation of 5 0 0 m measures 8 . 6 5 cm

A line AB,2000m long, lying at an elevation of 500m measures 8.65cm on a vertical photograph for which focal length is 20cm. Determine the scale of the photograph in an area the average elevation of Which is about 800 m.

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