5859.9936=4/3*3.14*r^2

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Solution for 5859.9936=4/3*3.14*r^2 equation: 


r in (-oo:+oo)

5859.9936 = 3.14*(4/3)*r^2 // - 3.14*(4/3)*r^2

5859.9936-(3.14*(4/3)*r^2) = 0

5859.9936-4.18666667*r^2 = 0

-4.18666667*r^2 = -5859.9936 // : -4.18666667

r^2 = 1399.67999889

r^2 = 1399.67999889 // ^ 1/2

abs(r) = 1399.67999889^(1/2)

r = 1399.67999889^(1/2) or r = -1399.67999889^(1/2)

r in { 1399.67999889^(1/2), -1399.67999889^(1/2) }

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