A) 38
B) 34
C) 42
D) 46
Correct Answer: C
Solution :
\[{{(x+2)}^{2}}-{{x}^{2}}=84\] \[\Rightarrow \]\[{{x}^{2}}+4x+4-{{x}^{2}}=84\] \[\Rightarrow \]\[4x=84-4=80\] \[\Rightarrow \]\[x=\frac{80}{4}=20\] \[\therefore \]\[x+2=20+2=22\] \[\therefore \] The required sum \[=20+22=42\]
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