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Simplifying
54.6745 = 3.14r2
Solving
54.6745 = 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.
54.6745 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
54.6745 + -3.14r2 = 0.00
Add '-54.6745' to each side of the equation.
54.6745 + -54.6745 + -3.14r2 = 0.00 + -54.6745
Combine like terms: 54.6745 + -54.6745 = 0.0000
0.0000 + -3.14r2 = 0.00 + -54.6745
-3.14r2 = 0.00 + -54.6745
Combine like terms: 0.00 + -54.6745 = -54.6745
-3.14r2 = -54.6745
Divide each side by '-3.14'.
r2 = 17.41226115
Simplifying
r2 = 17.41226115
Take the square root of each side:
r = {-4.172800157, 4.172800157}
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