A) \[\frac{\left( {{l}_{1}}+{{l}_{2}} \right)}{\sqrt{2}}\]
B) \[\frac{{{\left( {{l}_{1}}+{{l}_{2}} \right)}^{2}}}{2}\]
C) \[\sqrt{\frac{l_{1}^{2}+l_{2}^{2}}{2}}\]
D) \[\frac{\sqrt{l_{1}^{2}-l_{2}^{2}}}{2}\]
Correct Answer: C
Solution :
(c) \[\sqrt{\frac{l_{1}^{2}+l_{2}^{2}}{2}}\]You need to login to perform this action.
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