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9th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    In a mixture 60 litres, the ratio of milk and water \[2:1\]. If the this ratio is to be \[1:2\], then the quantity of water to be further added is:

    A) 20 liters  

    B)                    30 liters

    C) 50 liters             

    D)        60 liters

    E) None of these

    Correct Answer: D

    Solution :

    Explanation Option [d] is correct. Quantity of Milk \[=\text{ }60\times \left( 2/3 \right)\,\,\text{=}\,\,40\] liters Quantity of water \[=\text{ }60-40=20\] liters As per question we need to add water to get quantity \[2:1\] \[\Rightarrow \,\,40/\left( 20+x \right)\,\,\text{=}\,1/2\] \[\Rightarrow \,20+x=80\] \[\Rightarrow \,\,60\text{ }liters\]


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