The area of the curved surface of a right circular cylinder of radius 'a' and height 'b' is-

Correct option is A

Given:

- Radius of the cylinder = a

- Height of the cylinder = b

Formula for Curved Surface Area of a Cylinder:

The curved surface area of a right circular cylinder is given by:

Curved Surface Area (CSA) = $$2 \pi r h$$​​

where r is the radius and h is the height.

Solution:

Substituting r = a and h = b into the formula:

​$$\text{CSA} = 2 \pi a b$$​​

Answer:

​$$\mathbf{A. \, 2 \pi a b}$$​