Question

A boy of height 1.5 m is standing at a distance of 15m from the foot of a
lamp post. What is the height of the lamp post if the length of the shadow
of the boy is 6m.

Answer 1

tan@ = (1.5)/6 = 1/4

also ,

tan@ = h/ (15+6) = h/21

here , 1/4 = h/21

=> h = 21/4 = 5.25

The height of the lamp post is 5.25 m