A proton moves around a circular path $($radius $=2\mathrm{.}0$ mm$)$ in a uniform $0\mathrm{.}25-$T magnetic field. What total distance does this proton travel during a $1\mathrm{.}0-$s time interval? $($m $=1\mathrm{.}671027$ kg$,$ q $=1\mathrm{.}61019$ C$)$

Group of answer choices

$48$ km

$59$ km

$7\mathrm{.}5$ km

$71$ km

$82$ km