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

      Question

      A can complete a work in 15 days and B can complete the

      same work in 20 days. They work together for 5 days. If after that B's efficiency increases by 25%, then in how many more days will B alone complete the remaining work?
      A 18/7 days Correct Answer Incorrect Answer
      B 20/3 days Correct Answer Incorrect Answer
      C 33/5 days Correct Answer Incorrect Answer
      D 47/5 days Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, A's 1-day work = 1/15 B's 1-day work = 1/20 Together = 1/15 + 1/20 = 4/60 + 3/60 = 7/60 Work done in 5 days = 35/60 = 7/12 Remaining work = 1 - 7/12 = 5/12 B's efficiency increases by 25% Original time of B = 20 days New time = 20/1.25 = 16 days New 1-day work of B = 1/16 Time to complete remaining work = (5/12) x 16 = 20/3

      Practice Next
      More Time and work Questions
      ask-question