Explanation:

To find the curved surface area of the cylinder, follow these steps:

- Use the formula for the volume of a cylinder: \( V = \pi r^2 h \).

- The given volume is 396 cm³ and the radius \( r \) is 3 cm.

- Substitute the values to find the height \( h \): \( 396 = \frac{22}{7} \times 3^2 \times h \).

- Solve for \( h \): \( h = \frac{396 \times 7}{22 \times 9} = 6 \).

- The height of the cylinder is 6 cm.

- Use the formula for curved surface area: \( CSA = 2 \pi r h \).

- Substitute \( r = 3 \) cm and \( h = 6 \) cm: \( CSA = 2 \times \frac{22}{7} \times 3 \times 6 = 264 \text{ cm}^2 \).

- Option 3: 264 is correct.

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