Question

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◆ All the Formula of chapter 13{Surface areas & volumes}

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Answer 1

If u have RD Sharma u can check it there....

Answer 2

Answer:

Cuboid :

Total Surface Area (T.S.A) = 2 [ lb+ bh+ hl ]

Lateral Surface Area (C.S.A) = 2 [ bh + hl ]

Perimeter of a Cuboid = 4 [ l + b + h ]

Volume = lbh

Cube :

T.S.A = 6a²

C.S.A = 4a²

Perimeter = 12a

Volume = a³

Special Cases [Rooms] :

Area of 4 walls + ceiling or floor = lb + 2 [ bh + hl ]

Cylinder :

C.S.A = 2 rh

T.S.A = 2 r (r + h)

Volume = r²h

Hollow Cylinder :

Let R and r be the external and internal radii of a hollow cylinder of height h

C.S.A = 2 rh [ R + r ]

T.S.A = 2  [ R + r ] [ h + R - r ]

Volume =  [ R² - r² ] h

Cone :

base radius → r , slant height → l , height → h

l² = r² + h²

C.S.A =  

T.S.A =  

Volume = r²h

Sphere :

Surface Area = 4  

Volume =  

Hemi-sphere :

C.S.A = 2  

T.S.A = 3  

Volume =  

Spherical Shell :

Volume of a spherical shell whose outer and inner radii are R & r respectively

V =  [ R³ - r³ ]