Question

Find the length of rectangle whose perimeter is 28 cm and breadth is 5 cm

Answer 1

Answer:

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Answer 2

Given : Perimeter of a Rectangle is 28 cm and its Breadth is 5 cm .

To Find : Find the Length of Rectangle

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SolutioN : For Calculating the length of Rectangle let's apply the formula of Perimeter of Rectangle . Let's Solve :

$\maltese$ Formula Used :

• ${\underline{\boxed{\pmb{\sf{ Perimeter = 2 \bigg( Length + Breadth \bigg) }}}}}$

$\maltese$ Calculating the Length :

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Perimeter = 2 \bigg( L + B \bigg) } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { 28 = 2 \bigg( L + 5 \bigg) } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { 28 = 2L + 10 } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { 28 - 10 = 2L } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { 18 = 2L } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { \dfrac{18}{2} = L } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { \cancel\dfrac{18}{2} = L } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; {\underline{\boxed{\pmb{\sf{ Length = 9 \; cm }}}}} \; {\red{\bigstar}} \\ \\ \\ \end{gathered}$

$\therefore \;$ Length of the Rectangle is 9 cm .

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