2. Sample Papers
  3. Railways

Railways Sample Paper RRB (Group D) Sample Test Paper-4

  • question_answer
    If the square of the sum of two numbers is equal to 4 times of their product, then the ratio of these numbers is :

    A)  2:1                  

    B)  1:3

    C)  1:1                  

    D)  1:2

    Correct Answer: C

    Solution :

    According to question, \[{{(x+y)}^{2}}=4xy\] \[\Rightarrow {{x}^{2}}+{{y}^{2}}+2xy-4xy=0\] \[\Rightarrow \,\,\,{{(x-\,y)}^{2}}=0\] \[\Rightarrow x=y\]


You need to login to perform this action.
You will be redirected in 3 sec spinner