document.write( "Question 1029990: A container 80cm/60cm/70cm needs to be filled up completely with water. Tube A supplies 24l of water per minute and Tube B supplies 18l of water per minute. Mr Tan fills up the container by taking turns to use both Tubes for 17minutes. How long does he use each of the Tubes? \n" ); document.write( "
Algebra.Com's Answer #853878 by ikleyn(53746)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "A container 80cm/60cm/70cm needs to be filled up completely with water.
\n" ); document.write( "Tube A supplies 24l of water per minute and Tube B supplies 18l of water per minute.
\n" ); document.write( "Mr Tan fills up the container by taking turns to use both Tubes for 17minutes.
\n" ); document.write( "How long does he use each of the Tubes?
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\n" ); document.write( "\n" ); document.write( "        The solution in the post by @mananth is  FATALLY  INCORRECT.\r
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\n" ); document.write( "\n" ); document.write( "        It is incorrect,  because his setup equations are irrelevant to the problem.\r
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\n" ); document.write( "\n" ); document.write( "        I came to bring a correct solution.\r
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document.write( "The volume of the tank is 80*60*70 = 336000 cm^3,  or 336 liters.\r\n" );
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document.write( "Let x be the time for tube A working, in minutes;\r\n" );
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document.write( "then (17-x) is the time for the tube B working.\r\n" );
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document.write( "Write an equation for the total volume\r\n" );
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document.write( "    24*x + 18*(17-x) = 336.\r\n" );
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document.write( "Simplify and find x\r\n" );
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document.write( "    24x + 306 - 18x = 336\r\n" );
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document.write( "    24x - 18x = 336 - 306\r\n" );
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document.write( "        6x    =    30\r\n" );
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document.write( "         x    =    30/6 = 5.\r\n" );
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document.write( "So, tube A worked 5 minutes;  tube B worked 17-5 = 12 minutes.    <<<---===  ANSWER\r\n" );
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document.write( "CHECK.  The total volume is  24*5 + 18*12 = 336 liters,  which is precisely correct.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved correctly.\r
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\n" ); document.write( "\n" ); document.write( "This situation is  100%  typical.\r
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\n" ); document.write( "\n" ); document.write( "@mananth uses a computer code,  which generates solutions for his problems.
\n" ); document.write( "If a problem is one step from a standard,  the code produces gibberish,
\n" ); document.write( "but @mananth's reaction is zero - he  NEVER  reads what his code does produce:
\n" ); document.write( "he submits it to the forum without reading it,  without checking and without looking at it.\r
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\n" ); document.write( "\n" ); document.write( "It is why every his post should be checked by others and it is why I check as many of them as I can.\r
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