Posted by firstname.lastname@example.org (188.8.131.52) on August 19, 2003 at 19:53:45:
Gun metal is composed of copper and tin. An alloy of a certain grade of 1025 lbs. contains 861 lbs. of copper. How much tin must be added to 525 lbs. of a new grade so it will contain 430.5 lbs. of copper?
Thanks for your help.
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