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Q:

Pipes  A and B are emptying pipes and can empty a tank in 6 hours and 16 hours, respectively. C is a filling a pipe. All the three pipes were opened together. They took 80 minutes to empty $$ {5\over 8}th$$ of the tank. Pipe C alone can fill the tank in:

  • 1
    36 hours
  • 2
    42 hours
  • 3
    48 hours
  • 4
    40 hours
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Answer : 3. "48 hours"

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