The radius of a tractor wheel is $77 \mathrm{cm}$. Calculate the distance covered by it in $35$ rotations? (use $\pi =\frac{22}{7}$)

Find the perimeter of the given shape.

$\text{(Take }\mathrm{\pi }=\frac{22}{7}\text{ ) }$

Kannan divides a circular disc of radius $14 \mathrm{cm}$ into four equal parts. What is the perimeter of a quadrant-shaped disc? (use $\mathrm{\pi }=\frac{22}{7}$)

Find the area of the circle of radius $21 \mathrm{cm}$ (Use $\mathrm{\pi }=3.14$ ).

Find the area of a hula loop whose diameter is $28 \mathrm{cm}$ (use $\pi =\frac{22}{7}$ ).