The sum of the weight of an iron piece and of a copper piece is 1280gm. The volume of a copper piece is thrice of that the iron piece. if the weight of 1 cubic centimeter of iron is 7.8 gm and that of copper is 8.9 gm. Find the volume of each piece?
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volume of iron piece = 37.10cm cube
volume of copper piece = 111.30cm cube
volume of copper piece = 111.30cm cube
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