The volume of a two-inch diameter sphere is = 1.3333π or 4.1887 cubic inches.
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The new volume is 76.566 cubic inches.
surface area sphere = 4πr² → r = √(surface_area/4π) = √(1296π in²/4π) = √(324 in²) = 18 in Volume sphere = 4/3 πr³ = 4/3 π (18 in)³ = 7776π in³
If that is the radius, use the formula: volume = (4/3) pi r3. If that is the diameter, divide it by 2 first, to get the radius.
The volume of a sphere is 4 / 3 * pi * r3
The volume of this sphere is: 1,092,900,000,000 cubic km