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Six qualified workers can cast 10.000 tons of raw copper in [#permalink]
28 Jun 2003, 22:20
0% (00:00) correct
100% (00:00) wrong based on 1 sessions
Six qualified workers can cast 10.000 tons of raw copper in 2 hours. Two apprentices who work 2/3 as fast as a qualified worker are added to the group. Finally, the work is done. How much time has been saved due to the apprentices?