Saturday, 10 January 2015

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


6 comments:

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    ReplyDelete
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  3. It givews me more questions to refer

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  4. Now, I am the smartest person in the class

    ReplyDelete