11153.7824=4*3.14r^2

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Solution for 11153.7824=4*3.14r^2 equation: 


Simplifying
11153.7824 = 4 * 3.14r2

Multiply 4 * 3.14
11153.7824 = 12.56r2

Solving
11153.7824 = 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.
11153.7824 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
11153.7824 + -12.56r2 = 0.00

Add '-11153.7824' to each side of the equation.
11153.7824 + -11153.7824 + -12.56r2 = 0.00 + -11153.7824

Combine like terms: 11153.7824 + -11153.7824 = 0.0000
0.0000 + -12.56r2 = 0.00 + -11153.7824
-12.56r2 = 0.00 + -11153.7824

Combine like terms: 0.00 + -11153.7824 = -11153.7824
-12.56r2 = -11153.7824

Divide each side by '-12.56'.
r2 = 888.04

Simplifying
r2 = 888.04

Take the square root of each side:
r = {-29.8, 29.8}

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