# Mensuration chapter all Formulas class 9

Hey! Friends there are all important formula of mensuration class 9 is listed ðŸ‘‡ below.

Mensuration chapter all Formulas class 9 will help you a lot in solving the problem of Mensuration chapter.

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CUBOID

#### Total surface area of cuboid

=2(lb+bh+hl)

Where,

l=length

b=breadth

h=height

#### Area of 4 wall/Lateral surface area of cuboid

=2h(l+b)

Where,

l=length

b=breadth

h=height

#### Volume of cuboid

=lbh

Where,

l=length

b=breadth

h=height

#### Diagonal of cuboid

√( l2 + b2 +h2)

Where,

l=length

b=breadth

h=height

#### Edge of cuboid

=12a

Where,

a=side

# CUBE

#### Total surface area of Cube

=6a2 (6*side square)

#### Area of 4 wall/Lateral surface area of cube

=4a2(4*side square)

#### Volume of cube

=a^3(side cube)

#### Diagonal of cube

=✓3a

#### Length of all edges of cube

=4(l+b+h)

Where,

l=length

b=breadth

h=height

# CYLINDER

#### Curved surface area of cylinder

=2Ï€rh

Where,

r=radius

h=height

#### Total surface area of cylinder

=2Ï€r(h+r)

Where,

r=radius

h=height

#### Volume of cylinder

=Ï€r2h(pie* radius square *height)

Where,

r=radius

h=height

#### Volume of hollow cylinder

=Ï€(R^2-r^2)h

Where,

r=radius

h=height

# CONE

Cone Shape

Cone Diagram with h = height and r = radius and s = slant height

r = radius

h = height

s = slant height

V = volume

L = lateral surface area

B = base surface area

A = total surface area

Ï€ = pi = 3.1415926535898

√ = square root

#### Volume of a cone:

V = (1/3)Ï€r2h

#### Slant height of a cone:

s = √(r2 + h2)

#### Lateral surface area of a cone:

L = Ï€rs = Ï€r√(r2 + h2)

#### Base surface area of a cone (a circle):

B = Ï€r2

#### Total surface area of a cone:

A = L + B = Ï€rs + Ï€r2 = Ï€r(s + r) = Ï€r(r + √(r2 + h2)

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