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Banking Sample Paper SBI Junior Associates (Main) Sample Test Paper-1

  • question_answer
    A tap can empty a tank in one hour. A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?

    A)  20 min

    B)         30 min

    C)         40 min

    D)         45 min

    E)  Other than those given as options

    Correct Answer: A

    Solution :

    Let the capacity of tank be 60 lit (LCM of 30 & 60) Tap A can empty \[=\frac{60}{60}=1\] lit/m Tap B can empty \[\frac{60}{30}=2\] lit/m Now, Tap (A + B) can empty the tank in\[\left( \frac{60}{1+2}= \right)\frac{60}{3}=20\]minutes


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