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OpenStudy (anonymous):
tank can be filled by one pipe in 30 minutes and empted by another in 50 minutes. if both pipes are open how long will it take to fill the tank? help please!
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OpenStudy (anonymous):
So flow rates are 1/30 and 1/50, add them...
OpenStudy (anonymous):
oww okay! wait. can i ask a question? what is the LCD for 30 and 50?
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