Help me solve this question

[Idzhan]

Azim was walking along Rugayah Road after buying some magazines from the book
stalls in Batu Pahat. At a certain time, he was walking toward a streetlight 9 meter high at
the rate 4 meter per second. As he was 165 cm tall,
(a) how fast was the tip of his shadow moving?
(b) at what rate was his shadow length changing?

 

[Dr.Peterson]

Please follow the guidelines explained here:

Posting Guidelines (Summary)

Welcome to our tutoring boards! :) This page summarizes the main points from our posting guidelines. As our name implies, we provide math help (primarily to students with homework). We do not generally post immediate answers or step-by-step solutions. We don't do your homework. We prefer to...

www.freemathhelp.com

We need to see how much you can do, and why you got stuck, in order to know what help you need.

Have you tried relating the position of the shadow to the position of Azim, both relative to the pole?

 

[skeeter]

make a sketch with variable and fixed distances labeled.

set up equation(s) using the proportional relationships between similar triangles.

use implicit differentiation to find the relevant time derivative(s)