MarissaSanchez4924 MarissaSanchez4924 06-03-2024 Mathematics contestada 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. a) 4500 cm³ b) 6600 cm³ c) 7200 cm³ d) 9000 cm³