Prove that the area of a circular path of uniform width `h` surrounding a circular region of radius `r` is`pi\ h(2r+h)dot`

Prove that the area of a circular path of uniform width h surrounding a circular region of radius r is pih(2r+h) .

The area (in m^2 ) of a circular path of uniform width x metres surrounding a circular region of diameter d metres is .....

A circular pond is surrounded by a 2 m wide circular path. If outer circumference of circular path is 44 m, find the inner circumference of the circular path. Also find area of the path.

Determine the coordinates of the centre of mass of a right circular soild cone of base radius R and height h .

There is a long straight wire carrying electric current i. A circular region of radius r is selected perpendicular to wire in such a manner that wire lies along the axis of this circular region. How much magnetic flux is associated with this circular region?

A path of uniform width surrounds a circular park. The difference of internal and external circumferences of this circular path is 132 metres. Its width is : (Take pi= (22)/(7) )

A particle is moving around a circular path with uniform angular speed (x) . The radius of the circular path is (r). The acceleration of the particle is: