Question

find the length of a piece of paper which has the area 140cm² and breadth 10cm​

Answer 1

Answer:

The length of a piece of paper is $14$ cm.

Step-by-step explanation:

Given : Breadth of a paper = $10$ cm

         Area of piece of paper = $140$ sq.cm.

To find : Length of a paper = ?

Solution :

• It is given that the breadth of a paper = $10$ cm.

              Area of piece of paper = $140$ sq.cm.

• We have to find the of paper.
• We know that, a piece of a paper is in rectangle shape.
• The area of rectangle is given by, length*breadth.
• Use the above formula, and find the length of piece of paper.

         Area of piece of paper = Length * breadth

                             ∴ $140=length*10$

• Shift $10$ to other side, we can have

                            ∴ Length = $\frac{140}{10}$

                                          = $14$ cm.

• ∴ The length of a piece of paper is $14$ cm.

Answer 2

To find : length of piece of paper.

Given : area = $140 \ cm^{2}$ and breadth = $10\ cm$

Solution :

• According to question we are given that  breadth of paper is $10 \ cm$ and area is $140 \ cm^{2}$

• To find area we use following formula -

        Area of paper $=l \times b$

• Substituting the values we get,

         $140cm^{2} = l \times 10\ cm$

                  $l = \frac{140 \ cm ^{2} }{10\ cm } \\= 14 \ cm$

Hence, length of piece of paper is $14 \ cm$.