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    • Question

      Three taps A, B and C can fill a tank in 10, 18 and 6

      hours, respectively. If A is open all the time and B and C are open for one hour each alternatively, starting with B, the task will be fill in
      A 6 ½ hours Correct Answer Incorrect Answer
      B 5 hours Correct Answer Incorrect Answer
      C 6 hours Correct Answer Incorrect Answer
      D 5 ½ hours Correct Answer Incorrect Answer

      Solution

      A     B    C 10   18   6       90 9      5   15 First hours A+B=9+5=14 Second hours  A+C=9+15=24 fill the tank in two hours =14+24=38 similarly, work done in four hours =76 Now remaining work done by A+B- In the fifth day, total work =76+14 =90

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