Answer :
Volume of a sphere = (4/3) π (radius)³
Volume of this tank = (4/3) π (10-ft)³ cubic feet
At 7.5 gallons per cubic foot, that's 31,416 gallons .
Volume of this tank = (4/3) π (10-ft)³ cubic feet
At 7.5 gallons per cubic foot, that's 31,416 gallons .