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Railways R.R.C. (Hazipur) Solved Paper Held on 27-10-2013

  • question_answer
    The length of a rectangular plot is 4 - times it's breadth. If the area of the plot is 200 sqm, then what is it's length?

    A) 25 m                

    B) 20 m

    C) 62 m                            

    D) 30 m

    Correct Answer: D

    Solution :

    Let the breadth of rectangular plot be \[x\] metre then the area is   \[=x\times 4.5x=200\,sqm\] sqm. \[4.5{{x}^{2}}=200\,\,{{m}^{2}}\] \[{{x}^{2}}=\frac{200}{4.5}\] \[x=\sqrt{\frac{400}{9}}=\frac{20}{3}\] Then                 \[length=\frac{20}{3}\times \frac{9}{2}=30\,\,m\]


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