Question

An aerial photograph of a terrain having an average elevation of 1400 m is taken at a scale of 1:7500. The focal length of camera is 15 cm. The altitude of the flight above mean sea level (in m. up to one decimal place ) is

• A. 2525

Answer 1

The correct option is A 2525
Given;

$Scale,S=\frac{1}{7500}$

Elevation of terrain, h = 1400 m

Focal length of the camera, f = 15 cm

Altitude of flight, H =?

$S=\frac{f}{H-h}$

$\frac{1}{7500}=\frac{15\times {10}^{-2}}{H-1400}$

H = 2525 m