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

    Question

    Pipe A can fill a tank in 30 hours. Pipes A and B

    together can fill it in 12 hours. Pipes B and C together can fill it in 15 hours. In how many hours will A, B and C together fill the tank?
    A 10 hrs Correct Answer Incorrect Answer
    B 12 hrs Correct Answer Incorrect Answer
    C 18 hrs Correct Answer Incorrect Answer
    D 20 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, A = 1/30 B = 1/12 − 1/30 B = (5 − 2)/60 = 3/60 = 1/20 B + C = 1/15 C = 1/15 − 1/20 C = (4 − 3)/60 = 1/60 A + B + C = 1/30 + 1/20 + 1/60 = (2 + 3 + 1)/60 = 6/60 Required time = 60/6 hours = 10 hours

    Practice Next
    More Pipes and cisterns Questions

    Relevant for Exams:

    ask-question