A) 1
B) \[\sqrt{0.11}\]
C) \[\sqrt{0.01}\]
D) \[\sqrt{0.39}\]
Correct Answer: B
Solution :
[b] \[\sqrt{{{(0.5)}^{2}}+\,{{(0.8)}^{2}}+\,{{(c)}^{2}}}=1\] \[\therefore \] \[{{c}^{2}}\,=0.11\] or \[c=\sqrt{0.11}\]
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