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Simplifying
3525 = 3.14r2 * 40
Reorder the terms for easier multiplication:
3525 = 3.14 * 40r2
Multiply 3.14 * 40
3525 = 125.6r2
Solving
3525 = 125.6r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-125.6r2' to each side of the equation.
3525 + -125.6r2 = 125.6r2 + -125.6r2
Combine like terms: 125.6r2 + -125.6r2 = 0.0
3525 + -125.6r2 = 0.0
Add '-3525' to each side of the equation.
3525 + -3525 + -125.6r2 = 0.0 + -3525
Combine like terms: 3525 + -3525 = 0
0 + -125.6r2 = 0.0 + -3525
-125.6r2 = 0.0 + -3525
Combine like terms: 0.0 + -3525 = -3525
-125.6r2 = -3525
Divide each side by '-125.6'.
r2 = 28.06528662
Simplifying
r2 = 28.06528662
Take the square root of each side:
r = {-5.297668036, 5.297668036}
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