πŸ“’ Too many exams? Don’t know which one suits you best? Book Your Free Expert πŸ‘‰ call Now!


    Question

    Pipes β€˜A’ and β€˜B’ can fill a tank in 6 hours and

    9 hours, respectively. If pipe β€˜C’ is opened along with pipes β€˜A’ and β€˜B’, then the tank gets filled in 6 hours. Find the time taken by pipe β€˜C’ to empty (1/2)th part of the same tank.
    A 3.5 hours Correct Answer Incorrect Answer
    B 2.5 hours Correct Answer Incorrect Answer
    C 5.5 hours Correct Answer Incorrect Answer
    D 4.5 hours Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let capacity of the tank = 18 litres (lcm of 6 and 9) Efficiency of pipe β€˜A’ = (18/6) = 3 litres/hour Efficiency of pipe β€˜B’ = (18/9) = 2 litres/hour Efficiency of all the three pipes together = (18/6) = 3 litres/hour Efficiency of pipe β€˜C’ = 3 – (3 + 2) = (-2) litre/hour {Negative sign shows that pipe β€˜C’ is an outlet pipe} Required time taken = {(1/2) Γ— 18)}/2 = 4.5 hours

    Practice Next
    ask-question

    Not sure which exam is best for you Talk to our expert

    Get My Free Call