document.write( "Question 900180: A water tank can be filled by an inlet pipe in 6 hours. It takes 4 times as long for the outlet pipe to empty the tank. How long will it take to fill the tank if both pipes are open? \n" ); document.write( "
Algebra.Com's Answer #545823 by josgarithmetic(39617)\"\" \"About 
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The description means that the fill rate for inlet pipe is 1/6 tanks per hour and the FILL rate for the OUTLET pipe is \"-1%2F%284%2A6%29\" tanks per hour.\r
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\n" ); document.write( "\n" ); document.write( "If both pipes are open at the same time, then the filling rate is:
\n" ); document.write( "\"highlight%281%2F6%2B%28-1%2F24%29%29\"----tanks per hour--------Do the arithmetic.
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