103478.7=3.14*r^2

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Solution for 103478.7=3.14*r^2 equation: 


Simplifying
103478.7 = 3.14r2

Solving
103478.7 = 3.14r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-3.14r2' to each side of the equation.
103478.7 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
103478.7 + -3.14r2 = 0.00

Add '-103478.7' to each side of the equation.
103478.7 + -103478.7 + -3.14r2 = 0.00 + -103478.7

Combine like terms: 103478.7 + -103478.7 = 0.0
0.0 + -3.14r2 = 0.00 + -103478.7
-3.14r2 = 0.00 + -103478.7

Combine like terms: 0.00 + -103478.7 = -103478.7
-3.14r2 = -103478.7

Divide each side by '-3.14'.
r2 = 32955

Simplifying
r2 = 32955

Take the square root of each side:
r = {-181.535120569, 181.535120569}

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