140.9549=3.14*r^2

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Solution for 140.9549=3.14*r^2 equation: 


Simplifying
140.9549 = 3.14r2

Solving
140.9549 = 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.
140.9549 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
140.9549 + -3.14r2 = 0.00

Add '-140.9549' to each side of the equation.
140.9549 + -140.9549 + -3.14r2 = 0.00 + -140.9549

Combine like terms: 140.9549 + -140.9549 = 0.0000
0.0000 + -3.14r2 = 0.00 + -140.9549
-3.14r2 = 0.00 + -140.9549

Combine like terms: 0.00 + -140.9549 = -140.9549
-3.14r2 = -140.9549

Divide each side by '-3.14'.
r2 = 44.89009554

Simplifying
r2 = 44.89009554

Take the square root of each side:
r = {-6.70000713, 6.70000713}

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