CBSE Class 9 - Maths - CH 13 - Surface Area and Volume (Study Points)

Surface Area & Volume

Key Concepts

S.no.	Name	Figure	Lateral/ Curved Surface Area	Total Surface Area(TSA)	Volume(V)	Symbols use for
1	cuboid		2(l + b)xh	2(lb + bh + hl)	lbh	l=length b=breadth h=height
2	cube		4s2	6s2	s3	s = side
3	Right circular cylinder		2Πrh	2Πr(h + r)	Πr2h	h = height r = radius of base
4	Right circular cone		Πrl	Πr(l + r)	1 3 Πr2h	r = radius of base h = heightl = Slant height
5	Sphere		4Πr2	4Πr2	4 3 Πr3	r = OA = radius
6	Hemisphere solid		2Πr2	3Πr2	2 3 Πr3	r = OA = radius
7	Hemisphere hollow		2Πr2	2Πr2	2 3 Πr3	r = OA = radius

✎Note: See also Surface Area and Volumes (NCERT Ex 13.1)