A hollow cylindrical pipe is made up of copper. It is 21 dm long. The outer and inner diameters of

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#AhollowcylindricalpipeismadeupofcopperItis21dmlong
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A hollow cylindrical pipe is made up of copper. It is 21 dm 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.
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Thank You !
By - Vineet Pandey
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