A pinhole camera is placed 300m in front of a building so that the image is formed on a screen 5cm from the the pinhole. If the image is 2.5cm high, the height of the building will be
-
A.
25m -
B.
50m -
C.
100m -
D.
150m
Correct Answer: Option D
Explanation
==> (frac{v}{u}) = (frac{hi}{ho})
==> (frac{5}{300}) = (frac{2.5}{ho})
= 150m