Question

the perimeter of a rectangle piece of paper is 13 cm. if its width is 2.5 cm. then find its length (in cm)?​

Answer 1

Answer:

4 cm

Step-by-step explanation:

Please mark my answer as brainiest

Answer 2

Given:

Perimeter if the piece of paper,$\[ P= 13cm\]$

Width of the rectangular paper,$\[ b= 2.5cm\]$

To Find:

The length $(l)$of the rectangular piece of paper.

Solution:

Find the length of the rectangular piece of paper.

$\[\begin{array}{l}P = 2\left( {l + b} \right)\\ \Rightarrow 13 = 2\left( {l + 2.5} \right)\\ \Rightarrow 13 = 2l + 5.0\\ \Rightarrow 2l = 13 - 5\end{array}\]$

$\[\begin{array}{l} \Rightarrow 2l = 8\\ \Rightarrow l = \frac{8}{2}\\ \Rightarrow l = 4cm\end{array}\]$

Hence, The length of the rectangular piece of paper is $4cm$.