Question

circumference=11cm diameter=? ratio=?​

Answer 1

$\tt \blue{circumference \: of \: circle = 2\pi \: r} \\ 2\pi \: r = 11 \\ \tt \red{we \: know \: that \: d = 2r} \\ \tt \green{ratio \: of \: circumference \:and \: diameter \: is } \\ \tt \pink{2\pi \: r }$