New SIDBI Grade A New Batch Starts on Nov 18

    Register

    Question

    P can construct a robot individually in 20 hours, while Q requires 40 hours to complete the same task. If they collaborate, how many hours will it take them to assemble 6 robots?

    A 40 hours Correct Answer Incorrect Answer
    B 30 hours Correct Answer Incorrect Answer
    C 60 hours Correct Answer Incorrect Answer
    D 45 hours Correct Answer Incorrect Answer
    E 80 hours Correct Answer Incorrect Answer

    Solution

    Time taken by both to build one robot = 1/ {1/20 + 1/40} = 1/(3/40) So, time taken by both to build 6 robots = 6 × (40/3) = 80 hours

    Practice Next

    Relevant for Exams: