📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    An inlet pipe can fill an empty tank in 50 minutes

    whereas an outlet pipe can empty the fully filled tank in 75 minutes. Find the time taken by both the pipes together to fill half of the empty tank.
    A 60 minutes Correct Answer Incorrect Answer
    B 70 minutes Correct Answer Incorrect Answer
    C 75 minutes Correct Answer Incorrect Answer
    D 80 minutes Correct Answer Incorrect Answer

    Solution

    Let the total capacity of tank be 150 litres (LCM of 50 and 75)
    Efficiency of inlet pipe = (150/50) = 3 litres/minute
    Efficiency of outlet pipe = (150/75) = -2 litres/minute
    Required time = (0.5 Ă— 150) Ă· (3 - 2) = 75 minutes

    Practice Next
    More Pipes and cisterns Questions