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** Q 2472078836. ** One fill pipe A takes 3 minutes more to fill the cistern than two fill pipes A and B opened together to fill it. Second

fill pipe B takes `21 1/3` minutes more to fill cistern than two fill pipes A and B opened together to fill it.

When will the cistern be full if both pipes are opened simultaneously.

**IBPS-CLERK 2016 Mains 2001**