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Railways Sample Paper RRB (Group D) Sample Test Paper-7

  • question_answer
    Two natural numbers are in the ratio 3: 5 and their product is 2160. The smaller of the numbers is

    A)  36                   

    B)  24

    C)  18                   

    D)  12

    Correct Answer: A

    Solution :

    [a] Let the numbers be 3x and 5x. \[\therefore \,\,\,3x\times 5x=2160\] \[\Rightarrow \,\,\,{{x}^{2}}=\frac{2160}{3\times 5}=144=12\times 12\] \[\Rightarrow \,\,\,x=12\] \[\therefore \]Smaller number \[=3x=3\times 12=36\]


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