Question

(What is curved surface area of cylinder?​

Answer 1

Answer:

Curved Surface Area- The curved surface area is defined as the area of only curved surface, leaving the circular top and base.

Formula for calculating the Curved Surface Area (C.S.A.)-

Consider a cylinder having a height ‘h’ and base radius ‘r’.

The curved surface area of a cylinder is given as-

C.S.A.= 2\pi r h

Answer 2

Step-by-step explanation:

• The radius 'r' of a cylinder is the radius of its base. Now, the area of the rectangle = length × breadth. 2πr is the circumference of the circle and h is the height. Area of the curved surface will be = 2πr × h = 2πrh.

• Let us carry out a small activity. Take a coin. We know that coin is circular in shape. Now place another coin on the first coin and so on. You will see that when you place such coins, the structure that you get is a cylinder, which is three dimensional. Let us learn about the volume of a Cylinder in this chapter.