A farmer wants to fence his circular poultry farm with barbed wire whose radius is 420 m. The cost of fencing is Rs.12 per metre. He has Rs.30,000 with him. How much more amount will be needed to fence his farm? (Here π = \(\frac { 22 }{ 7 } \))

Find the perimeter of the given shape (Figure) (Take \(\pi =\frac { 22 }{ 7 } \)).

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

A park is circular in shape. The central portion has playthings for kids surrounded by a circular walking pathway. Find the walking area whose outer radius is 10 m and inner radius is 3 m.

The radius of a circular flower garden is 21 m. A circular path of 14 m wide is laid around the garden. Find the area of the circular path.