A) 3.5cm
B) \[(3.5)\sqrt{2}cm\]
C) \[(3.5)\sqrt{3}cm\]
D) \[7.0cm\]
Correct Answer: B
Solution :
[b] Since \[\Delta ABC~\sim \Delta DEF,\] \[\frac{\Delta ABC}{\Delta DEF}=\frac{B{{C}^{2}}}{E{{F}^{2}}}=\frac{16}{49}\] \[\therefore \,\,\,\,\frac{BC}{EF}=\frac{4}{7}\] Also, \[\frac{2\sqrt{2}}{EF}=\frac{4}{7}\,\,\Rightarrow \,\,EF=(3.5)\sqrt{2}\] cmYou need to login to perform this action.
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