Question

A hollow steel pipe has an outer radius of 12 cm and an inner radius of 10 cm. It has a length of 100 cm. What is the volume of steel required to make the pipe

Answer 1

$V = \pi r^{2} h$

Volume of material of pipe,

V = (volume of outer cylinder) - (volume of inner cylinder)

= $\pi r_{1}^ {2} l -$ $\pi r_{2}^ {2} l$

= $\pi (12^{2} - 10^{2}) 100$

= $\pi (144-100)100$

= $4400\pi cm^{3}.$

Answer 2

The volume of steel is 13828.57 cubic cm

Step-by-step explanation:

Outer radius of pipe R = 12 cm

Inner radius of pipe r = 10 cm

Length of pipe = 100 cm

Volume of steel = Outer volume - Inner volume

Volume of steel =$\pi R^2 h - \pi r^2 h$

Volume of steel =$\frac{22}{7}(12^2-10^2)(100)$

Volume of steel =$13828.57 cm^3$

Hence The volume of steel is 13828.57 cubic cm

#Learn more:

A metal pipe 154 cm long has an outer radius of 5.5 cm and an inner radius of 4.5 cm what is the volume of metal used to make pipe? please give the solution immediately..

https://brainly.in/question/2307165