Question

A rectangular Sheet of paper is 12 1½ cm long and 10 ½ cm wide. Find it's perimeter
please tell with explanation​

Answer 1

Given :

• Length of Sheet = 12½ cm
• Breadth of Sheet = 10½ cm

To Find :

• Perimeter of Sheet

Solution :

In this Question, Length and Breadth are given in mixed fraction, so firstly we will convert them into Improper fraction after that we will find the perimeter of the sheet.

Length of the Sheet :

⠀⟶⠀Length = 12½

⠀⟶⠀Length = 12 × 2 + 1/2

⠀⟶⠀Length = 24 + 1/2

⠀⟶⠀Length = 25/2 cm

Breadth of Sheet :

⠀⟶⠀Breadth = 10½

⠀⟶⠀Breadth = 10 × 2 + 1/2

⠀⟶⠀Breadth = 20 + 1/2

⠀⟶⠀Breadth = 21/2 cm

Perimeter of Sheet :

⠀⟶⠀Perimeter = 2(Length + Breadth)

⠀⟶⠀Perimeter = 2(25/2 + 21/2)

⠀⟶⠀Perimeter = 2(46/2)

⠀⟶⠀Perimeter = 2 × 23

⠀⟶⠀Perimeter = 46 cm

So, Perimeter of the Sheet is 46cm

___________________

Answer 2

Given :-

Length of a rectangular sheet is 12½ cm and breadth is 10½ cm.

To Find :-

Perimeter of the given sheet respectively .

Used Concepts :-

• Perimeter of a rectangle i.e 2 × ( l + b ) , where " l is length and b is breadth ".

Solution :-

Let , Length of the sheet = l = 12½ cm

= 25/2 cm

Breadth of the sheet = b = 10½ cm

= 21/2 cm .

Now , Perimeter ( P ) of the sheet :-

2 × ( l + b )

2 × ( 25/2 + 21/2 )

2 × ( 46/2 )

2 × 23

46 cm

Henceforth , The perimeter of the given Sheet is 46 cm .