Question

A rope is placed on the ground in the form of an equilateral triangle of side 2.2 meta if this rope is separate out out in the shape of circle what will be the radius of the circle

Answer 1

circumference of a circle is equal to the length of rope.
circumference of a circle = 2πr

$2.2 = 2\pi \: r \\ 2.2 = 2 \times \frac{22}{7} \times r \\ \frac{2.2}{2} \times \frac{7}{22} = r \\ \frac{22}{2 \times 10} \times \frac{7}{22} = r \\ \frac{7}{20} = r$