Please guys. Would bless you

10 hours

Step-by-step explanation:

volume of lower portion = 85x125x40 = 425,000

volume of upper portion = 20x30x125 = 75,000

in 1.5 hours, the pump removed 75,000

in one hour it removed 50,000     (75000/1.5 = 50,000)

425,000 / 50,000 = 8.5 hours for bottom portion

8.5 + 1.5 = 10 hours total time for top and bottom

i guess this is the answer...

☃️ Hope this helps☃️