16=1/3(3.14)(r^2)(6)

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Solution for 16=1/3(3.14)(r^2)(6) equation: 


r in (-oo:+oo)

16 = 3.14*6*(1/3)*r^2 // - 3.14*6*(1/3)*r^2

16-(3.14*6*(1/3)*r^2) = 0

16-6.28*r^2 = 0

-6.28*r^2 = -16 // : -6.28

r^2 = 2.5477707

r^2 = 2.5477707 // ^ 1/2

abs(r) = 2.5477707^(1/2)

r = 2.5477707^(1/2) or r = -2.5477707^(1/2)

r in { 2.5477707^(1/2), -2.5477707^(1/2) }

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