Difference between revisions of "1950 AHSME Problems/Problem 29"
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Revision as of 13:39, 18 January 2012
Problem
A manufacturer built a machine which will address envelopes in minutes. He wishes to build another machine so that when both are operating together they will address envelopes in minutes. The equation used to find how many minutes it would require the second machine to address envelopes alone is: