A 3000 m long line lying at an elevation of 450 m measures 10 cm on a vertical photograph. The focal length of the camera is 21 cm. The scale of the photograph for the area having an elevation of 1000 m will be« Back to Previous Page

A. 1 : 27381 B. 1 : 25008 C. 1 : 20606 D. 1 : 30421

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