301.5656=4*3.14r^2

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Solution for 301.5656=4*3.14r^2 equation: 


Simplifying
301.5656 = 4 * 3.14r2

Multiply 4 * 3.14
301.5656 = 12.56r2

Solving
301.5656 = 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.
301.5656 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
301.5656 + -12.56r2 = 0.00

Add '-301.5656' to each side of the equation.
301.5656 + -301.5656 + -12.56r2 = 0.00 + -301.5656

Combine like terms: 301.5656 + -301.5656 = 0.0000
0.0000 + -12.56r2 = 0.00 + -301.5656
-12.56r2 = 0.00 + -301.5656

Combine like terms: 0.00 + -301.5656 = -301.5656
-12.56r2 = -301.5656

Divide each side by '-12.56'.
r2 = 24.01

Simplifying
r2 = 24.01

Take the square root of each side:
r = {-4.9, 4.9}

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