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10th Class Mathematics Related to Competitive Exam Question Bank Algebra

  • question_answer
    It costs Rs. 10 a kilometer to fly and Rs. 2 a kilometer to drive. If one travels 200 km covering fi \[x\] km of the distance by flying and the rest by driving, then the cost of the trip is

    A)  Rs. 2,000        

    B)         Rs. 24,000

    C)  Rs. (8\[x\] + 400)     

    D)        Rs. (12\[x\] + 400)

    Correct Answer: C

    Solution :

     Let distance travelled by flying is\[x\,\,km\]. \[\therefore \]Distance travelled by driving\[=(200-x)\,\,km\]. Hence cost of the trip\[=10.x+2(200-x)\]                 \[=8x+400\].


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