A) 8
B) 4
C) 7
D) 11
Correct Answer: C
Solution :
[c] The length of the edges are given by \[a=5-2=3,b=9-3=6,c=7-5=2\], so length of the diagonal \[=\sqrt{{{a}^{2}}+{{b}^{2}}+{{c}^{2}}}=\sqrt{9+36+4}=7\,\,units\]
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