The rate of change of a shadow'in kopyası

A man running from a street lamp.
A street lamp is 8m high. A man of height 1.6m walks along the street away from the lamp at a steady rate of 1 m/s. At what rate is the length of his shadow changing?
– Mehmet Yalçın Güngör, Doug Kuhlmann, Mark Willis

Information: The rate of change of a shadow'in kopyası