((3.14r^2)*10)+(2/3)*(3.14r^3)

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Solution for ((3.14r^2)*10)+(2/3)*(3.14r^3) equation: 


r in (-oo:+oo)

3.14*(2/3)*r^3+3.14*10*r^2 = 0

2.0933333438*r^3+31.4*r^2 = 0

r^2*(2.0933333438*r+31.4) = 0

2.0933333438*r+31.4 = 0 // - 31.4

2.0933333438*r = -31.4 // : 2.0933333438

r = -31.4/2.0933333438

r = -14.99999993

r^2 = 0

1*r^2 = 0 // : 1

r^2 = 0

r = 0

r in { -14.99999993, 0 }

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