10490.2376=4*3.14r^2

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Solution for 10490.2376=4*3.14r^2 equation: 


Simplifying
10490.2376 = 4 * 3.14r2

Multiply 4 * 3.14
10490.2376 = 12.56r2

Solving
10490.2376 = 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.
10490.2376 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
10490.2376 + -12.56r2 = 0.00

Add '-10490.2376' to each side of the equation.
10490.2376 + -10490.2376 + -12.56r2 = 0.00 + -10490.2376

Combine like terms: 10490.2376 + -10490.2376 = 0.0000
0.0000 + -12.56r2 = 0.00 + -10490.2376
-12.56r2 = 0.00 + -10490.2376

Combine like terms: 0.00 + -10490.2376 = -10490.2376
-12.56r2 = -10490.2376

Divide each side by '-12.56'.
r2 = 835.21

Simplifying
r2 = 835.21

Take the square root of each side:
r = {-28.9, 28.9}

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