The sum of the weights of an iron piece and of a copper piece is 1280 g. The volume of the copper piece is twice that of the iron piece. If the weight of 1 cu.cm of iron is 7.8 g and that copper is 8.9 g, find the volume of each piece.
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Step-by-step explanation:
Step-by-step explanation:
Let the amount of iron piece be x
Amount of Copper piece=2x
Density of iron=7.8g/cc
Density of copper=8.9g/cc
Weight of iron=7.8x
Weight of copper=17.8x
Total weight=1280g
7.8x+17.8x=1280
25.6x=1280
x=50
Weight of iron=7.8×50=390g
Weight of copper=890g
Volume of iron=390/7.8=50ml
Volume of copper=890/8.9=100ml
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