# Find Volume and Surface Area of Tube Shape Donut

__Surface Area of the Torus :__If we divide the torus into k cylinders each having length l, now consider the division of the torus into k cylinders each having the length l, curved surface area of each such cylinder will be 2

*Π*rl; consequently the surface area of the torus will be 2

*Π*rlk and or we can say the surface area of the torus as 4

*Π*

^{2}rR.

__Volume of the Torus :__If we divide the torus into k cylinders each of length l; then the volume of each cylinder will be

*Π*r

^{2}l. Volume of the torus will be the sum of the volumes of these k cylinders,

*Π*r

^{2}lk. The volume of the torus to be equal to 2

*Π*

^{2}r

^{2}R.

The torus is the mathematical name for a doughnut shape or rubber ring shape whuch is hollow inside.

The Torus can be form by revolving small circle (radius r) along the line formed by the bigger circle (radius R). torus has no edges or vertices and It is not a polyhedron.