ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!


    тЪб Month End Offer - Flat 52% Off On All Courses! Enroll Now тЪб
    00:00:00 AM Left

    Question

    An elephant can do a work as fast as two horses тАШAтАЩ

    and тАШBтАЩ can do it by working together. If horse тАШAтАЩ alone can complete the work in 8 hours and horse тАШBтАЩ in 12 hours, then find the time taken by elephant to complete the work.
    A 4.8 hours Correct Answer Incorrect Answer
    B 11.2 hours Correct Answer Incorrect Answer
    C 12.2 hours Correct Answer Incorrect Answer
    D 13.2 hours Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the total work = 24 units Efficiency of horse who can complete the work in 8 hours = 24/8 = 3 units/hour Efficiency of horse who can complete the work in 12 hours = 24/12 = 2 units/hour Therefore, time taken by both horses to complete the work together = 24/(3 + 2) = 4.8 hours Therefore, time taken by the elephant to complete the work = 4.8┬аhours

    Practice Next
    More Time and work Questions
    ask-question