A) 22
B) 24
C) 26
D) 32
Correct Answer: A
Solution :
We know that Area of circle \[=\pi {{r}^{2}}\] \[\therefore \] According to question, \[\pi {{r}^{2}}=38.5\,sq\,\,cm\] \[\therefore \] \[{{r}^{2}}=\frac{38.5}{22}\times 7={{(3.5)}^{2}}\] \[\therefore \] \[r=3.5\,cm\] \[\therefore \] Circumference of circle \[=2\pi r\] \[=2\times \frac{22}{7}\times 3.5=22\,cm\]You need to login to perform this action.
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