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10th Class Mathematics Related to Competitive Exam Question Bank Algebra

  • question_answer
    If 6 kg of sugar and 5 kg of tea together cost Rs. 209 and 4 kg of sugar and 3 kg of tea together cost Rs. 131, then the cost of 1 kg sugar and 1 kg tea are respectively

    A)  Rs. 11 and Rs. 25

    B)  Rs. 12 and Rs. 20  

    C)  Rs. 14 and Rs. 20

    D)  Rs. 14 and Rs. 25

    Correct Answer: B

    Solution :

     Let cost of \[1\,\,kg\] sugar is \[x\] and cost of \[1\,\,kg\] tea is\[y\] Then      \[6x+5y=209\]                                   ? (i) and        \[4x+3y=131\]                                   ? (ii) Solving equations (i) and (ii), we get\[x=14\]and\[y=25\]


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