64307.2=3.14r^2

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Solution for 64307.2=3.14r^2 equation: 


Simplifying
64307.2 = 3.14r2

Solving
64307.2 = 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.
64307.2 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
64307.2 + -3.14r2 = 0.00

Add '-64307.2' to each side of the equation.
64307.2 + -64307.2 + -3.14r2 = 0.00 + -64307.2

Combine like terms: 64307.2 + -64307.2 = 0.0
0.0 + -3.14r2 = 0.00 + -64307.2
-3.14r2 = 0.00 + -64307.2

Combine like terms: 0.00 + -64307.2 = -64307.2
-3.14r2 = -64307.2

Divide each side by '-3.14'.
r2 = 20480

Simplifying
r2 = 20480

Take the square root of each side:
r = {-143.10835056, 143.10835056}

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