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8th Class Mathematics Comparing Quantities Question Bank Commercial Mathematics

  • question_answer
    On selling 17 balls at Rs. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is

    A) Rs. 45             

    B)          Rs. 50

    C) Rs. 60             

    D)          Rs. 55

    Correct Answer: C

    Solution :

    Let the C.P of a ball be Rs. x then, the C.P of 17 balls = Rs. x According to the question, \[17x-720=5x\] \[\Rightarrow \]            \[17x-5x=720\] \[\Rightarrow \]            \[12x=720\] \[\Rightarrow \]            \[x=60\]


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