To find the diameter of a circle when given the area, you can use the formula for the area of a circle:
\[ A = \pi r^2 \]
where \( A \) is the area and \( r \) is the radius.
Given that the area \( A = 372 , \text{cm}^2 \), we can rearrange the formula to find the radius:
\[ r^2 = \frac{A}{\pi} \]
\[ r = \sqrt{\frac{A}{\pi}} \]
Now substituting the given area:
\[ r = \sqrt{\frac{372}{\pi}} \]
Using \( \pi \approx 3.14 \):
\[ r \approx \sqrt{\frac{372}{3.14}} \approx \sqrt{118.58} \approx 10.9 , \text{cm} \]
To find the diameter \( d \), we use the formula:
\[ d = 2r \]
Calculating the diameter:
\[ d \approx 2 \times 10.9 \approx 21.8 , \text{cm} \]
Rounding to the nearest whole number, the length of the diameter is:
\[ \boxed{22} , \text{cm} \]