A copper rod of diameter 1 cm and length 8 cm is drawn in to a wire of length 18 m of uniform thickness. Find the thickness of wire.

Explanation

To solve the problem, we need to find the thickness of the wire formed from a copper rod. We will use the principle that the volume of the copper rod is equal to the volume of the wire.

### Step 1: Calculate the volume of the copper rod
The formula for the volume \( V \) of a cylinder is given by:
\[ V = \pi r^2 h \]
Where:
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