Two pipes A and B can separately fill a tank in 2 hours and 3 hours respectively. If both the pipes are opened simultaneously in the empty tank, then the tank will be filled in:

[A]1 hour 12 minutes

[B]1 hour 15 minutes

[C]1 hour 20 minutes

[D]2 hours 30 minutes

**1 hour 12 minutes**

Part of the tank filled by pipe A and B in 1 hour

∴ Required Time

Hence option [A] is correct answer.