Use A = &pi;r&sup2; to find r, then C = 2&pi;r.<br><br>
&bull; &pi;r&sup2; = 154<br>
&bull; Using &pi; = \frac{22}{7}: r&sup2; = 154 × \frac{7}{22} = 49<br>
&bull; r = &radic;49 = 7 cm<br>
&bull; C = 2&pi;r = 2 × \frac{22}{7} × 7 = 44 cm<br>
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Final Answer: 44 cm