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NTSE Sample Paper NTSE SAT Practice Test-8

  • question_answer
    What is the time needed to empty a cuboidal water reservoir 10m long, 9 m wide and 3 m deep at the rate of 45 litres per minute?

    A) 100 hrs                       

    B) 90hrs

    C) 80hrs                          

    D) 60 hrs.

    Correct Answer: A

    Solution :

    [a] Volume of the reservoir \[=\left( 10\times 9\times 3 \right){{m}^{3}}\] \[=270\text{ }{{m}^{3}}\] Capacity of the reservoir \[=\text{ }270\times 1000\]litres Time to empty the reservoir \[=\frac{270\times 1000}{45\times 60}\] hrs = 100 hrs.


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