Two pipes A and B can fill a tank in 2 and 6 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

Options
1) 3 min
2) 2.5 min
3) 2 min
4) 1.5 min

• ans is 1.5 min
• 9 years agoHelpfull: Yes(1) No(0)
• In one day's of (A's Work + B's Work) = 1/2+1/6;
  ============================= = 8/12;
  .............................................................. = 2/3;
  means total time to take the tank is = 3/2;
  ........................................................... = 1.5 mints;
• 9 years agoHelpfull: Yes(0) No(0)