3846.5=3.14*r^2

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Solution for 3846.5=3.14*r^2 equation: 


Simplifying
3846.5 = 3.14r2

Solving
3846.5 = 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.
3846.5 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
3846.5 + -3.14r2 = 0.00

Add '-3846.5' to each side of the equation.
3846.5 + -3846.5 + -3.14r2 = 0.00 + -3846.5

Combine like terms: 3846.5 + -3846.5 = 0.0
0.0 + -3.14r2 = 0.00 + -3846.5
-3.14r2 = 0.00 + -3846.5

Combine like terms: 0.00 + -3846.5 = -3846.5
-3.14r2 = -3846.5

Divide each side by '-3.14'.
r2 = 1225

Simplifying
r2 = 1225

Take the square root of each side:
r = {-35, 35}

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