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


    ⚑ Azaadi sale - Celebrate Independence Day with Flat 55% Off On all courses! 13 to 17 Aug ⚑ Enroll Now

    Question

    Pipe β€˜A’ and pipe β€˜B’, together can fill 20% of

    a tank in 5 hours while pipe β€˜C’ takes 30 hours to empty it. Pipe β€˜A’ and pipe β€˜B’ were opened together. After 24 hours, pipe β€˜C’ is also opened. Find the total time taken to fill the empty tank this way.
    A 30 hours Correct Answer Incorrect Answer
    B 20 hours Correct Answer Incorrect Answer
    C 35 hours Correct Answer Incorrect Answer
    D 25 hours Correct Answer Incorrect Answer

    Solution

    Time taken by pipe β€˜A’ and pipe β€˜B’, together to fill the tank = 5/0.2 = 25 hours Let the total capacity of tank = 150 units Efficiency of pipe (A + B) = 150/25 = 6 units/hour Efficiency of pipe β€˜C’ = 150/30 = 5 units/hour Tank filled by pipe (A + B) in 24 hours = 24 Γ— 6 = 144 units Time taken by all three pipes to fill the remaining tank = (150 – 144)/(6 – 5) = 6 hours Total time taken = 24 + 6 = 30 hours

    Practice Next
    ask-question

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

    Get My Free Call