Question 965642
Those TWO pumps together work at a rate 100 gallons per minute.


You have basement dimensions, but to get volume as gallons, you need to know:
This is wrong:   <s>231 cubic feet = 1 gallon</s>
Know these:  231 cubic inches = 1 gallon, 12 inches = 1 foot


{{{((40*50*1&1/3)+(24*22)(1&1/3))}}}, cubic feet, the volume of water in the basement - which seems to be given in two sections.


You would use a uniform rates formula like RT=V for rate, time, volume.
You would use it as T=V/R.