Question

A hollow cylindrical pipe is made up of copper. It is 21 cm long, the outer and inner diameters of
the pipe are 10 cm and 6 cm respectively, find the volume of copper used in making the pipe.​

Answer 1

Answer:

Let h = height of the pipe = 21 dm = 210 cm

R = External Radius =

r = Internal Radius =

Volume of copper used in making the pipe

= Volume of External cylinder - Volume of Internal cylinder

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Answer 2

Answer:

Let h = height of the pipe = 21 dm = 210 cm

R = External Radius =

r = Internal Radius =

Volume of copper used in making the pipe

= Volume of External cylinder - Volume of Internal cylinder

Step-by-step explanation: