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Q. A pipe can empty a tank in 40 min. A second pipe with diameter twice much as that of the first is also attached with the tank to empty it. The two together can empty the tank in

  • (A) 8 min
  • (B) 13 1/3 min
  • (C) 30 min
  • (D) 33 min
  • Correct Answer - Option(B)
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  • Filed under category Math
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