Question

if the perimeter of a rectangle is 15 cm, find the sum of its length and breadth​

Answer 1

Answer:

l+b=7.5 cm

Step-by-step explanation:

(given) Perimeter =15cm

therefore, p=2l+2b

15=2l+2b

15=2(l+b)

15/2=l+b

thus, l+b=7.5cm

Answer 2

Given : Perimeter of a Rectangle is 15 cm .

To Find : Find the Sum of Length and Breadth

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SolutioN :

$\maltese$ Formula Used :

$\qquad \; {\purple{\bigstar \; \; {\red{\underbrace{\underline{\green{\sf{ Perimeter{\small_{(Rectangle)}} = 2 \bigg( Length + Breadth \bigg) }}}}}}}}$

$\maltese$ Calculating the Sum :

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

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { 15 = 2 \bigg( Length + Breadth \bigg) } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { \dfrac{15}{2} = Length + Breadth } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { \cancel\dfrac{15}{2} = Length + Breadth } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; {\underline{\boxed{\pmb{\sf{ Length + Breadth = 7.5 \; cm }}}}} \; {\green{\pmb{\bigstar}}} \\ \\ \\ \end{gathered}$

$\therefore \;$ Sum of Length and Breadth is 7.5 cm .

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