Question

A boy stands at a distance of 2 m from lamp post and cast a shadow of 45° on the ground. Find the height of the lamp post.

Answer 1

Answer:

Height of lamp is 4 m.

Step-by-step explanation:

tan45° = x/(2+y)

also

tan45°=boy height/y

tan45°= 1

y= boys height or y = b

x/(2+y)= b/y

xy = 2b + 2y

x = 2(b+y)/y

x = 2(y+y)/y

= 2(2y)/y

= 4y/y

= 4