document.write( "Question 1010820: Pump A and Pump B each can empty a tank in 2hrs. Another Pump C can empty the same tank using double the time of Pump A. If all 3 pumps are working together at the same time, how long will it take to empty the tank?\r
\n" ); document.write( "\n" ); document.write( "Please have a clear explanation! Thanks. \n" ); document.write( "
Algebra.Com's Answer #626278 by lwsshak3(11628)\"\" \"About 
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Pump A and Pump B each can empty a tank in 2hrs. Another Pump C can empty the same tank using double the time of Pump A. If all 3 pumps are working together at the same time, how long will it take to empty the tank?
\n" ); document.write( "Please have a clear explanation! Thanks.\r
\n" ); document.write( "\n" ); document.write( "Pump A can empty the tank in 2-hrs
\n" ); document.write( "Its work rate=1/2
\n" ); document.write( "Pump B can empty the tank in 2-hrs
\n" ); document.write( "Its work rate=1/
\n" ); document.write( "Pump C can empty the tank in 4-hrs
\n" ); document.write( "Its work rate=1/4
\n" ); document.write( "sum of indv. work rates =work rate working togethe
\n" ); document.write( "rworking together the 3 pumps can empty the tank in x hrs
\n" ); document.write( "their work rate =1/x
\n" ); document.write( "1/2+1/2+1/4=/1/x
\n" ); document.write( "5/4=1/x
\n" ); document.write( "x=4/5
\n" ); document.write( " long will it take to empty the tank? 4/5 hr \n" ); document.write( "
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