how long to lower temps When living quarters at 100

It will take a long time to cool the inside of an RV if the inside temp is that hot especially since the outside temp is still hot and working against the ac units. Measure the air temp at the return side of the unit versus the output side. If the return temp is say 95, and the output side is 75ish then the units are doing all they can do. Not sure where you are, but find some shade!