A man 1.92 m tall, walking near a street light at night, casts a 3.88 m long shadow directly in front of him. The lightpost is 5.82 m behind the man. How tall is the lightpost?

Answer 1

Draw the figure. Note similar triangles. Let h be the height of the lamppost.

h/(5.82+3.88) = 1.92/3.88

check that on your figure.