Answer: V≈2035.75ft³
That is a small 3 after ft
HOPE THIS HELPS
Answer:5400
Step-by-step explanation: 1 hour is 60 minutes, so 90 * 60 = 5400
Total surface area = 2 * circular base + circumference * height
= 2 * pi*(4)^2 + 8pi * 12
= 32pi + 96pi
= 128pi answer