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UPSC Civil Service Exam Questions - Engineering

Q1:

In an aerial photo, the image of the top of a tower is found to be 10 cm from the centre of thephotograph. If the height of the tower is 100 m and the flying height of the aircraft is 1000 m above the average terrain height, then the height displacement of the image from the true position will be

A 10 mm

B 20 mm

C 50 mm

D 100 mm

ANS:A - 10 mm

d = rh/H = (10cm * 100m)/1000m = 10mm.