3.14*(r^2*16)=500

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Solution for 3.14*(r^2*16)=500 equation: 


Simplifying
3.14(r2 * 16) = 500

Reorder the terms for easier multiplication:
3.14(16r2) = 500

Remove parenthesis around (16r2)
3.14 * 16r2 = 500

Multiply 3.14 * 16
50.24r2 = 500

Solving
50.24r2 = 500

Solving for variable 'r'.

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

Divide each side by '50.24'.
r2 = 9.952229299

Simplifying
r2 = 9.952229299

Take the square root of each side:
r = {-3.154715407, 3.154715407}

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