A) \[30\,cm\]
B) \[60\,cm\]
C) \[70\,cm\]
D) \[80\,cm\]
Correct Answer: B
Solution :
[b] Length of wire |
\[=2\pi \times 42=2\times \frac{22}{7}\times 42=264cm\] |
Let side are \[6x\] and \[5x\] |
\[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2(6x+5x)=264\] |
\[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,11x=132\,\,\,\,\,\,\,\,\,\,\,\,\Rightarrow \,\,\,\,x=12\] |
\[\therefore \] Smaller side \[=12\times 5=60\,cm.\] |
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