188.49=(3.14*r^2*5)/3

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Solution for 188.49=(3.14*r^2*5)/3 equation: 


r in (-oo:+oo)

188.49 = (3.14*5*r^2)/3 // - (3.14*5*r^2)/3

188.49-((3.14*5*r^2)/3) = 0

188.49-5.23333333*r^2 = 0

-5.23333333*r^2 = -188.49 // : -5.23333333

r^2 = 36.01719748

r^2 = 36.01719748 // ^ 1/2

abs(r) = 36.01719748^(1/2)

r = 36.01719748^(1/2) or r = -36.01719748^(1/2)

r in { 36.01719748^(1/2), -36.01719748^(1/2) }

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