document.write( "Question 636514: Pipe A can fill in 20 minutes and Pipe B in 30 minutes and Pipe C can empty the same in 40 minutes. If all of them work together, find the time taken to fill the tank \n" ); document.write( "
| Algebra.Com's Answer #401071 by jerryguo41(197)     You can put this solution on YOUR website! 1. find the rate in which the cans can be filled by each pipe\r \n" ); document.write( "\n" ); document.write( "2. write the equation \n" ); document.write( "Rate of pipe A + Rate of pipe B + Rate of Pipe C = 1 Full Can \n" ); document.write( "Rate of pipe A: 1/20 per min \n" ); document.write( "Rate of pipe B: 1/30 per min \n" ); document.write( "Rate of pipe C: 1/40 per min \n" ); document.write( " \n" ); document.write( "x= number of min\r \n" ); document.write( "\n" ); document.write( "3. Clear Fractions (*40) \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4. It will take 9 mins and 14 sec. to fill the empty can with all three pipes. \n" ); document.write( " |