7th Class Mathematics Decimals and Fractions Question Bank Fractions and Decimals

  • question_answer
    If the cost of \[5\frac{2}{5}\] litres of milk is Rs. \[101-\frac{1}{4},\]what is its cost per litre?

    A)  Rs. \[18\frac{3}{4}\]         

    B)         Rs. \[17\frac{3}{4}\]

    C)  Rs. \[16\frac{3}{4}\]       

    D)         Rs. \[15\frac{3}{4}\]

    Correct Answer: A

    Solution :

       Cost of \[5\frac{2}{5}\] litres of milk \[=Rs.\,\,101\frac{1}{4}\] \[\Rightarrow \]  Cost of 1 litre of milk \[=Rs.\,\,\left( \frac{405}{4}\div \frac{27}{5} \right)=Rs.\,\,\left( \frac{405}{4}\times \frac{5}{27} \right)\] Hence, the cost of milk is\[Rs.\,18\,\frac{3}{4}\]. per litre.


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