193.0472=4*3.14r^2

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Solution for 193.0472=4*3.14r^2 equation: 


Simplifying
193.0472 = 4 * 3.14r2

Multiply 4 * 3.14
193.0472 = 12.56r2

Solving
193.0472 = 12.56r2

Solving for variable 'r'.

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

Add '-12.56r2' to each side of the equation.
193.0472 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
193.0472 + -12.56r2 = 0.00

Add '-193.0472' to each side of the equation.
193.0472 + -193.0472 + -12.56r2 = 0.00 + -193.0472

Combine like terms: 193.0472 + -193.0472 = 0.0000
0.0000 + -12.56r2 = 0.00 + -193.0472
-12.56r2 = 0.00 + -193.0472

Combine like terms: 0.00 + -193.0472 = -193.0472
-12.56r2 = -193.0472

Divide each side by '-12.56'.
r2 = 15.37

Simplifying
r2 = 15.37

Take the square root of each side:
r = {-3.920459157, 3.920459157}

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