document.write( "Question 853427: An inlet pipe can fill a tank in 8 hours when the drainpipe is open and in 5 hours when the drainpipe is closed. How long will it take to empty a full tank when the inlet pipe is closed? \n" ); document.write( "
Algebra.Com's Answer #514129 by richwmiller(17219)\"\" \"About 
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1/5-1/p=1/8\r
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