brake pedal goes almost to the floor. What's the usual problem?

I admit my pucker factor went up by 20 after hearing the condition of my brakes. No way did I want to leave the shop without getting them repaired.

How are we supposed to know when the rear breaks aren’t working?

The main symptoms I noticed was the spongy pedal and it took longer to stop. Thank goodness for redundancy and the brakes did work.

I watched a video of replacing drum brake cylinders. A Bigger job than I would tackle.