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Railways Quantitative Aptitude Average Sample Paper Average & Problems on Ages Sample Test Paper-7

  • question_answer
    Average of two numbers is 14.5 and square root of their product is 10. What are the numbers?

    A)  25, 4   

    B)         20, 5

    C)  10, 15 

    D)  Cannot be determined

    Correct Answer: A

    Solution :

    [a] Let numbers be a and b \[\therefore \] \[\frac{a+b}{2}=14.5\] a + b = 29        .... (1) \[\sqrt{ab}=10\] ab = 100           ? (2) By equation (1) and (2) a = 25, b = 4 \[\therefore \] Numbers are 25, 4


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