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A hollow cylindrical pipe 21 dm long is made of copper. Its outer and inner diameters are 10 cm and 6 cm respectively. Find the volume of the copper used in making the pipe.

Asked by Topperlearning User 10th April 2014, 3:24 PM
Answered by Expert
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

Answered by Expert 10th April 2014, 5:24 PM
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