Question 363356
{{{C=2pi*r}}} Start with the circumference of a circle formula.



{{{C/(2pi)=r}}} Divide both sides by {{{2pi}}} to isolate "r".



{{{r=C/(2pi)}}} Flip the equation.



{{{r=10/(2pi)}}} Plug in {{{C=10}}} (the given distance of the rope).



{{{r=10/(2*3.14159265)}}} Replace {{{pi}}} with {{{3.14159265}}} (note: Use more digits of {{{pi}}} to get better accuracy).



{{{r=10/(6.2831853)}}} Multiply 2 and {{{3.14159265}}} to get {{{6.2831853}}}.



{{{r=1.59154943273756}}} Divide {{{10}}} into {{{6.2831853}}} to get  {{{1.59154943273756}}} (this figure is approximate).



So the radius of a circle which has a circumference of {{{10}}} meters is about {{{1.59154943273756}}} meters.