Question

find the primater of a rectangle breath =20cm length =40cm​

Answer 1

Answer:

l=40cm

b=20cm

we know that area of rectangle=l*b

20*40

=800cm²

hope this helps u

Answer 2

$\color{skyblue}{\bigstar \large\underline{\boxed{\bf\pink{Question:-}}}}$

$\tt \red{Find \: the \: perimeter \: of \: a \: rectangle \: breath } \\ \tt \red{=20 \: cm \: length =40 \: cm \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: }$

D I A G R A M :

$\begin{gathered} \pink{\begin{gathered} \sf{20 \:m}\huge\boxed{ \begin{array}{cc} \: \: \: \: \: \: \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \ \: \: \end{array}} \\ \: \: \: \: \: \sf{40 \: m} \end{gathered}}\end{gathered}$

$\large \sf \green{Given:-}$

• Length of Rectangle = 40 cm
• Breadth of Rectangle = 20 cm
• $\sf \color{skyblue} \mapsto2(40 + 20) \: cm$

$\color{skyblue}{\bigstar \large\underline{\boxed{\bf\pink{Solution:-}}}}$

Formula :-

$\dag \orange{ \boxed{\sf {Perimeter_{(Rectangle)} = 2( \ell + b)}}}$

$\frak \purple{ \underline{ \bigstar{Finding \: the \: perimeter \: of \: rectangle}}}$

$\sf \blue{= 2( \ell + b)}$

$\sf \color{skyblue}{ \mapsto 2( 40 + 20)}$

$\sf \color{gold} \mapsto2(60)$

$\sf \green{2 \times 60 = 120 \: cm}$

$\pink{ \underline{ \boxed{ \bf{ \therefore \: The \: perimeter \: of \: rectangle = 120 \: cm}}}}$