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9th Class Mathematics Surface Areas and Volumes Question Bank Surface Area and Volume

  • question_answer
    A horsed drinking through has the dimensions shown. How long will it take to fill the through if water flows it in 22 litters per minute?

    A)  6 m                             

    B)  6 m 18 sec.

    C)  6 m 42 sec                   

    D)  6 m 22 sec

    Correct Answer: B

    Solution :

    (b): Volume \[=\frac{1}{2}\times \frac{22}{7}\times \frac{21}{100}\times 2\times 1000\] Time\[=\frac{\frac{1}{2}\times \frac{22}{7}\times \frac{21}{100}\times 2\times 1000}{22}=6m\,18\sec \].         


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