1492.2536=4*3.14r^2

Solution for 1492.2536=4*3.14r^2 equation:

Simplifying
1492.2536 = 4 * 3.14r2

Multiply 4 * 3.14
1492.2536 = 12.56r2

Solving
1492.2536 = 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.
1492.2536 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
1492.2536 + -12.56r2 = 0.00

Add '-1492.2536' to each side of the equation.
1492.2536 + -1492.2536 + -12.56r2 = 0.00 + -1492.2536

Combine like terms: 1492.2536 + -1492.2536 = 0.0000
0.0000 + -12.56r2 = 0.00 + -1492.2536
-12.56r2 = 0.00 + -1492.2536

Combine like terms: 0.00 + -1492.2536 = -1492.2536
-12.56r2 = -1492.2536

Divide each side by '-12.56'.
r2 = 118.81

Simplifying
r2 = 118.81

Take the square root of each side:
r = {-10.9, 10.9}