Dear Readers, If you are preparing for IBPS Clerk, IBPS PO, SBI or any other competitive exam than it’s very important for you to remember each Mensuration Formulas . Because in the exam you will definitely find atleast 4-5 questions based on mensuration. In this post we will discuss bit about mensuration like what is the exact meaning of mensuration and Mensuration Formulas .

**Mensuration** is basically a branch of mathematics that deals with measurement of various parameters of geometric figures.

## Mensuration Formulas

#### Rectangle

Let l= length , b=breadth

Area of a Rectangle = length (l) X breadth (b)

Perimeter of rectangle = 2X(l+b)

#### Square

Let a= side of Square

Area = a×a = a^{2}

Perimeter = 4a

#### Paralleogram

Let l=length of paralleogram , h= height of paralleogram , b=breadth of paralleogram

Area of Parallelogram = l X h

Perimeter of paralleogram = 2X(l+b)

#### Triangle

Area of Triangle = 1/2 X b X h

#### Rhombus

d1 and d2 are the diagonals of the rhombus

Area = 1/2 X d1 X d2

Perimeter = 4 X length of Side = 4l

#### Circle

Let r = radius, d = diameter of circle

Area = πr^{2} = 1/4πd2

Circumference of Circle = 2πr

Radius r= d/2

Area of Sector of a Circle = θπr^{2}/360

where θ= measure of angle of the sector , r= radius of the sector

#### Cylinder

Let r = radius of base , h= height of cylinder

Volume of cylinder = πr^{2}h

Total surface area of cylinder = 2πr(r + h)

Curved Surface Area = 2πrh

#### Sphere

Let r= radius of sphere , d= diameter of sphere

Volume of sphere = 4/3 πr^{3} =1/6 πd^{3}

Surface Area of sphere = 4 πr^{2} = πd^{2}

#### Hemisphere

Let r= radius of hemisphere

Volume of sphere = 2/3 πr^{3} = 1/12 πd^{3}

Surface Area of sphere = 3 πr^{2}

Curved Surface area of a hemisphere = 2 πr^{2}

#### Cone

Let r= radius of base, l = lateral height of cone , h = height of cone

Lateral height of Cone l = {(h^{2}+r^{2})}1/2

Volume of right circular cone = 1/3 πr^{2}h

Area of base of a cone = πr^{2}

Curved Surface Area of Cone = πrl

Total Surface area of cone = πr(r+l)

#### Cube

Volume of Cube =l X l X l = l^{3}

Length of Diagonal of Cube = √3l

#### Cuboid

Let l=length , b= breadth , h= height

Volume of Cuboid = l X b X h

Length of diagonal of cuboid =(l^{2}+b^{2}+h^{2})^{1/2}

Total Surface area of Cuboid = 2(lb+bh+lh)