📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

  • google app store apple app store

    • Question

      ‘R’ completes a job in 10 days. ‘S’ is twice as

      efficient as ‘R’. How much time will they take to complete 120% of the work together?
      A 4 days Correct Answer Incorrect Answer
      B 2 days Correct Answer Incorrect Answer
      C 6 days Correct Answer Incorrect Answer
      D 3 days Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let total work = 100x units.
      Efficiency of R = 100x / 10 = 10x units/day.
      S is twice as efficient, so S's efficiency = 2 × 10x = 20x units/day.
      120% of work = 100x × 1.20 = 120x units.
      Combined efficiency = 10x + 20x = 30x units/day.
      Time taken = 120x / 30x = 4 days.

      Practice Next

      Relevant for Exams:

      ask-question