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      Question

      Komal and Seema individually can complete a task in

      β€˜5a’ hours and β€˜7a’ hours respectively. If they together can complete (4/5)th of the work in 7 hours, then find the value of β€˜a’.
      A 2 Correct Answer Incorrect Answer
      B 3 Correct Answer Incorrect Answer
      C 4 Correct Answer Incorrect Answer
      D 5 Correct Answer Incorrect Answer

      Solution

      According to the question, => 7 x [(1/5a) + (1/7a)] = 4/5 => 7 x (12/35a) = 4/5 => a = 3

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