A) 64 m
B) 32 m
C) 20 m
D) None of these
Correct Answer: B
Solution :
Area of the square shaped pond \[=8\times 8=64\,\,{{\text{m}}^{2}}\] Area of the field\[=8\times 64=512\,\,{{\text{m}}^{2}}\] If the length of the field be x m, then the breads of the field \[=\frac{x}{2}\,\,\text{m}\] \[\therefore \] \[x\times \frac{x}{2}=512\] \[\Rightarrow \] \[{{x}^{2}}=1024\] \[\therefore \] \[x=\sqrt{1024}=32\,\,\text{m}\]
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