document.write( "Question 811549: if 3 water pumps can empty a water tank in 80 minutes, it will take 4 pumps ? minutes to empty the same tank. \n" ); document.write( "
Algebra.Com's Answer #488785 by josgarithmetic(39630)    ![]() You can put this solution on YOUR website! If 80 minutes for 3 pumps, then 3 times longer for just 1 pump. \n" ); document.write( "One pump empties the water tank in \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "FOUR pumps go at the rate of  |