Question

A man ,2m tall,walks at the rate of 123m/s towards a street light which is 513m above the ground.At what rate is the tip of his shadow moving?At what rate is the length of the shadow changing when he is 313m from the base of the light?a man 2m tall walks at the rate of 1 2/3 m/s towards a strret light which is 5 1/3 m above the ground. at what rat

Answer 1

The answer is 246/511 m/s.
USE Calculus especially derivatives.