Question

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

Answer 1

Step-by-step explanation:

GIVEN, perimeter=15

so, perimeter of rectange is

2(l+b)

Hence, Perimeter=2(l+b)

15=2(l+b)

15/2=l+b

7.5=l+b

Hope it helps u

Answer 2

Given : Perimeter of a Rectangle is 15 cm .

To Find : Find the Sum of Length and Breadth

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SolutioN :

$\dag$ Formula Used :

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

$\dag$ Calculating the Sum :

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

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

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

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

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

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

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