Answer:
Area of circle \[=\pi {{r}^{2}}\] \[\pi {{r}^{2}}=38.5\text{ }c{{m}^{2}}\] \[\frac{22}{7}{{r}^{2}}=38.5\] \[\pi {{r}^{2}}\text{= }\frac{38.5\times 7}{22}\] \[{{r}^{2}}=12.25\] r = 3.5 cm Circumference = 2\[\pi {{r}^{2}}\] \[=2\times \frac{22}{7}\times 3.5\] = 22 cm
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