A coil which is made by winding 500 meters of copper wire


A coil which is made by winding 500 meters of copper wire of cross-sectional diameter 1.26 mm has the same mass as another coil of copper wire whose cross-sectional diameter is 1.4 mm. Find the length of wire in the second coil.

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Basic Computer Science: A coil which is made by winding 500 meters of copper wire
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