Answer
$\approx$ 7 cm
Work Step by Step
Area of circle = 154 $cm^{2}$
The area A of a circle whose radius has length r is given by
A = $\pi r^{2}$
154 =$\pi r^{2}$
$r^{2}$ = $\frac{154}{3.14}$
r = $\sqrt \frac{154}{3.14} $ = 7.001 cm $\approx$ 7 cm
