Question

I
Q.1 - Fill in the blanks :-
(1- marks each )
a. Curved Surface Area of a cone = ....
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Answer 1

The surface area of a cone is equal to the curved surface area plus the area of the base: π r 2 + π L r , \pi r^2 + \pi L r, πr2+πLr, where r denotes the radius of the base of the cone, and L denotes the slant height of the cone. The curved surface area is also called the lateral area.

Answer 2

a. πrl

Curved Surface Area (CSA) = πrl. Here, r = Radius of the circular base of the cone. l = Slant height of the cone. When the cone is in the form of an unrolled lateral area, r is referred to as the length of the arc of a sector and l is referred to as the radius of the sector