A) 13
B) 38
C) 48
D) 23
Correct Answer: A
Solution :
[a] Let the given number be x. Then, \[{{x}^{2}}-25={{(x-25)}^{2}}\] \[\Rightarrow \] \[{{x}^{2}}-25={{x}^{2}}+625-50x\] \[\Rightarrow \] \[50x=650\] \[\Rightarrow \] \[x=13.\] Hence, the given number is 13. |
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