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9th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    On a map, 1 inch represents 150 km. what is the actual distance between the two cities, if they are 4 % inches apart?

    A)  225                                       

    B)  300

    C)  525                       

    D)         675  

    Correct Answer: D

    Solution :

     This is a problem of direct proportionality. The actual distance increases with the increase in the distance on the map. Let \[x\] be the actual distance between the cities. Forming proportions, we get,                 \[\frac{1}{150}=\frac{{{4}^{\frac{1}{2}}}}{x}\] \[\therefore \]       \[x=4.5\times 150=675\]


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