Question

length 180 m breadth 15 dam find the perimeter with process​

Answer 1

Given :

• Length = 180 m
• Breadth = 15 cm

To Find :

• Perimeter = ?

$\\ \qquad{\rule{200pt}{2pt}}$

SolutioN :

$\dag$ Formula Used :

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

$\dag$ Calculating the Perimeter :

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

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Perimeter = 2 \bigg( 180 + 15 \bigg) } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Perimeter = 2 \times 195 } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; {\underline{\boxed{\pmb{\sf { Perimeter = 390 \; cm }}}}} \; {\purple{\pmb{\bigstar}}} \\ \\ \\ \end{gathered}$

$\therefore \;$ Perimeter of the Rectangle is 390 cm .

$\\ \qquad{\rule{200pt}{2pt}}$

Answer 2

Given:-

• Length of rectangle= 180m
• Breadth of rectangle= 15dam

To find:-

• Perimeter of rectangle

Solution to convert dam into m.

$\implies\large{\sf{ \: 1 dam \: = 10m}}$

$\implies\large{\sf{15dam = 15 \times 10m}}$

$\large \underline{ \boxed{\bf{ \: \: \: \: \: \: \: \: \: \implies 150m \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: }}}$

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Calculating for perimeter.

Now, we got all the units as same. Therefore we can easily calculate the perimeter of the rectangle by putting it in the formula. The formula for finding the perimeter is given below.

$\large \green{\underline{ \blue{ \boxed{\bf{ \red { \maltese \rightarrow2(length + breadth)}}}}}}$

Now we can easily substitute the values and find the perimeter of the rectangle.

$\large{\sf{ \implies{2(180m + 150m)}}}$

$\large{\sf{ \implies 2 \times 330m}}$

$\large \blue{\underline{ \green{ \boxed{{\sf{ \red{\implies 660m}}}}}}}$

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Basic concept:-

• A rectangle is a 2-D(2-Dimensional) figure.
• It is a type of quadrilateral with opposite side of equal length.
• It's all the angles are 90°.
• Diagonals of the rectangle are equal and bisect each other.
• A rectangle can be a parallelogram.
• Opposite sides of rectangle are equal and are at equidistant.
• Adjacent angle = 180° satisfies for a rectangle.
• Sum of interior angles of the rectangle are 360°.
• Sum of exterior angles of a rectangle are 360°.
• Items which have rectangular faces are:-
• Almirah, Doors, Drawers etc..

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Deriviation of formula for perimeter of rectangle:-

• We know that a two sides of rectangle are parallel and are of equal length.
• So, Length+Length+Breadth+Breadth.
• =2 length+2breadth
• =Taking 2 as common we get:-
• 2(length+breadth)

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