4/3*pi*radius3 = 523.6
Making the radius the subject of the above gives it a value of 5.000003897 or about 5 cm
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volume is equal to four thirds pie times the radius cubed.
113.097336 units cubed.
The volume of the sphere is 38792.38 inches cubed Formula: Volume = PI x diameter cubed / 6 Step 1) 3.14 x 42 cubed / 6 = 38792.38609 Volume = 38792.38 inches cubed (the power of 3) +++ I have tested the above values but the standard formula for the volume of a sphere is 4/3.pi.(radius cubed).
400 units cubed
Volume of the sphere: 4/3*pi*13 cubed = 9202.772 cubic units rounded to 3 d.p.