A pipe can fill a tank in 8 minutes and another pipe can empty 6 kilo liters of water in 1 minute. if both the pipes are opened together the empty tank can be filled up in 20 minutes. the capacity of the tank (in kilo liters) is

• 80 kilo liters
  
  Let the capacity of the tank be 'x' kL, then
  Filling in 1 min = x/8 kL and Draining in 1 min = 6 kL
  => 20(x/8 - 6) = x
  5x/2 - 120 = x
  3x = 240
  x = 80
  Therefore, capacity of the tank is 80 kL.
• 5 years agoHelpfull: Yes(0) No(0)