A) 57cm
B) 56cm
C) 54cm
D) None of these
Correct Answer: B
Solution :
Given, area of circle \[=\text{ }2464\text{ }c{{m}^{2}}\] \[\pi {{r}^{2}}=2464\Rightarrow {{r}^{2}}=\frac{2464\times 7}{22}\] \[\Rightarrow \,\,{{r}^{2}}=784\Rightarrow r=28\] [taking square root] \[\therefore \] Diameter of a circle \[=2r=2\times 28=56\,cm\]
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