5024=4*3.14*r^2

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Solution for 5024=4*3.14*r^2 equation: 


Simplifying
5024 = 4 * 3.14r2

Multiply 4 * 3.14
5024 = 12.56r2

Solving
5024 = 12.56r2

Solving for variable 'r'.

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

Add '-12.56r2' to each side of the equation.
5024 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
5024 + -12.56r2 = 0.00

Add '-5024' to each side of the equation.
5024 + -5024 + -12.56r2 = 0.00 + -5024

Combine like terms: 5024 + -5024 = 0
0 + -12.56r2 = 0.00 + -5024
-12.56r2 = 0.00 + -5024

Combine like terms: 0.00 + -5024 = -5024
-12.56r2 = -5024

Divide each side by '-12.56'.
r2 = 400

Simplifying
r2 = 400

Take the square root of each side:
r = {-20, 20}

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