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


    Question

    Pipe β€˜X’ alone can fill a tank in 20 hours. When

    pipe β€˜X’ and β€˜Y’ are opened together, they can fill 60% of the same tank in 6 hours. Find the time taken by pipe β€˜Y’ alone to fill 80% of the same tank.
    A 25 hrs Correct Answer Incorrect Answer
    B 48 hrs Correct Answer Incorrect Answer
    C 22 hrs Correct Answer Incorrect Answer
    D 16 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ; Time taken by pipes β€˜X’ and β€˜Y’ together to fill 100% of the tank = 6 Γ· 0.6 = 10 hours Let the capacity of the tank be 100 litres. {LCM (20 and 10)} Efficiency of pipe β€˜X’ = (100/20) = 5 litres/hour Efficiency of pipe β€˜X’ and β€˜Y’ together = (100/10) = 10 litres/hour Efficiency of pipe β€˜Y’ = 10 – 5 = 5 litres/hour Time taken by pipe β€˜Y’ to fill 80% of the tank = (100 Γ— 0.8)/5 = 16 hours

    Practice Next
    More Pipes and cisterns Questions

    Relevant for Exams:

    ask-question

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

    Get My Free Call