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OpenStudy (anonymous):
i need help. One pipe fills a tank in 1 hour while another pipe can fill the same tank in 2 hours. How long will it take to fill the tank if both pipes are used.
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OpenStudy (anonymous):
one pipe fills tank in 1 hr and one pipe in 2 hrs. in 40 minutes, first pipe fills tank (2/3 full) and 2nd pipe fills tank 1/3 full. Total time = 40 minutes
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