148^²/4pi
=1742.83
2 pi r=148
r=148/2pi
Now
Area=pi r^²
Pi×(148)^²/4pi^²
=148^²/4pi
Mark brainliest please
Answer:
<h2>30 mm</h2>
Step-by-step explanation:
The formula of an area of a circle:

<em>r</em><em> - radius</em>
<em />
We have

Substitute:
<em>divide both sides by π</em>
<em>use π ≈ 3.14</em>

The diameter <em>d = 2r</em>.
Therefore

Im debating between b. and c. but I'd go more with C.