Step 1: Calculate the final volume of the bar using the given formula:
\[ V_{final} = \pi \left( (R + \Delta R)^2 - R^2 \right) \cdot L \]
\[ V_{final} = \pi \left( R^2 + 2R\Delta R + \Delta R^2 - R^2 \right) \cdot L \]
\[ V_{final} = \pi \left( 2R\Delta R + \Delta
Show more…