4*3.14*r^2=69524.1216

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Solution for 4*3.14*r^2=69524.1216 equation: 


Simplifying
4 * 3.14r2 = 69524.1216

Multiply 4 * 3.14
12.56r2 = 69524.1216

Solving
12.56r2 = 69524.1216

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '12.56'.
r2 = 5535.36

Simplifying
r2 = 5535.36

Take the square root of each side:
r = {-74.4, 74.4}

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