📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      'X' and 'Y' together can complete the work in 16 days.

      'Y' alone can complete the work in 24 days. If Z is 50% more efficient than X, find the time taken by 'Z' alone to finish the work.
      A 32 days Correct Answer Incorrect Answer
      B 12 days Correct Answer Incorrect Answer
      C 20 days Correct Answer Incorrect Answer
      D 24 days Correct Answer Incorrect Answer

      Solution

      Let the total work be 240 units Combined efficiency of 'X' and 'Y' = (240/16) = 15 units/day Efficiency of 'Y' alone = (240/24) = 10 units/day Efficiency of 'X' alone = 15 - 10 = 5 units/day Efficiency of 'Z' = 5 X (3/2) = (15/2) units/day Time taken by 'Z' alone to finish the work = 240 ÷ (15/2) = (240 X 2)/15 = 32 days

      Practice Next
      More Time and work Questions

      Relevant for Exams:

      ask-question