1.) A swimming pool os 40ft long 20ft wide 8ft deep at the deep end and 3ft deep at a shallow depth. The bottom being rectangular. If the pool is filled with by pumping water into it at the rate of 100 cubic ft per min. How fast is the water level rising, when it is 3ft deep at the deep end?

2.) At what rate is the shadow of a 6ft tall man shortening as he walks at 8ft per sec. on a level path towards the street light that is 20ft above the ground.

Here are two problems about related rates that I am having a problem with solving, so can anyone give me the right way to solve them?

tnx