Question

    Three taps A, B and C can fill a tank in 10, 18 and 6

    hours, respectively. If A is open all the time and B and C are open for one hour each alternatively, starting with B, the task will be fill in
    A 6 ½ hours Correct Answer Incorrect Answer
    B 5 hours Correct Answer Incorrect Answer
    C 6 hours Correct Answer Incorrect Answer
    D 5 ½ hours Correct Answer Incorrect Answer

    Solution

    A     B    C 10   18   6       90 9      5   15 First hours A+B=9+5=14 Second hours  A+C=9+15=24 fill the tank in two hours =14+24=38 similarly, work done in four hours =76 Now remaining work done by A+B- In the fifth day, total work =76+14 =90

    Practice Next