54=3.14r^2

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Solution for 54=3.14r^2 equation: 


Simplifying
54 = 3.14r2

Solving
54 = 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.
54 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
54 + -3.14r2 = 0.00

Add '-54' to each side of the equation.
54 + -54 + -3.14r2 = 0.00 + -54

Combine like terms: 54 + -54 = 0
0 + -3.14r2 = 0.00 + -54
-3.14r2 = 0.00 + -54

Combine like terms: 0.00 + -54 = -54
-3.14r2 = -54

Divide each side by '-3.14'.
r2 = 17.19745223

Simplifying
r2 = 17.19745223

Take the square root of each side:
r = {-4.146981098, 4.146981098}

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