document.write( "Question 97182: A tank can be filled by one pipe in 30 minutes & emptied by another in 50 minutes. If both pipes are open, how long will it take to fill the tank? \n" ); document.write( "
Algebra.Com's Answer #70809 by ankor@dixie-net.com(22740)\"\" \"About 
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A tank can be filled by one pipe in 30 minutes & emptied by another in 50 minutes. If both pipes are open, how long will it take to fill the tank?
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\n" ); document.write( "Let x = time (in minutes) required, when both pipes are open, and they fill the tank
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\n" ); document.write( "Let the full tank = 1
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\n" ); document.write( "\"x%2F30\" - \"x%2F50\" = 1
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\n" ); document.write( "Multiply equation by 150 to get rid of the denominators, resulting in:
\n" ); document.write( "5x - 3x = 150
\n" ); document.write( "2x = 150
\n" ); document.write( "x = 150/2
\n" ); document.write( "x = 75 minutes required to fill the tank
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\n" ); document.write( "Check solution
\n" ); document.write( "\"75%2F30\" - \"75%2F50\" =
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\n" ); document.write( "\"5%2F2\" - \"3%2F2\" = 2/2 = 1
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