Question

Perimeter of a rectangle is 40cm. If its breadth is 10cm, what is its length.​

Answer 1

Answer:

10 cm.

Explanation:

Given,

• Perimeter of the rectangle = 40cm.
• Breadth = 10 cm.

To find,

• The length of the rectangle.

Let x be the measure of the length.

Perimeter = 2(Length + Breadth)

⇒40cm = 2(x + 10cm)

⇒40cm = 2x+ 20cm

⇒40cm - 20cm = 2x

⇒20cm = 2x

⇒10cm = x

∴ The length of the rectangle is 10cm.

Method used :

• Transposition

Answer 2

$\red\bigstar$Question Given :

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• $\dashrightarrow$Perimeter of a rectangle is 40cm. If its breadth is 10cm, what is its length.

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$\pink\bigstar$Required Solution :

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☯ Value Given to us :

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• $\dashrightarrow$Perimeter of rectangle = 60 cm

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• $\dashrightarrow$Breath of rectangle = 10 cm

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$\green\bigstar$Required Diagram :

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$\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\multiput(0,0)(5,0){2}{\line(0,1){3}}\multiput(0,0)(0,3){2}{\line(1,0){5}}\put(0.03,0.02){\framebox(0.25,0.25)}\put(0.03,2.75){\framebox(0.25,0.25)}\put(4.74,2.75){\framebox(0.25,0.25)}\put(4.74,0.02){\framebox(0.25,0.25)}\multiput(2.1,-0.7)(0,4.2){2}{\sf\large 10cm}\multiput(-1.4,1.4)(6.8,0){2}{\sf\large 10cm}\put(-0.5,-0.4){\bf }\put(-0.5,3.2){\bf }\put(5.3,-0.4){\bf }\put(5.3,3.2){\bf }\end{picture}$

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☯ Formula used Here :

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• $\dashrightarrow$Perimeter = 2 ( l + b)

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☯ Putting Value in Formula :

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• $\dashrightarrow$P = 2 ( l + b) cm

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• $\dashrightarrow$40 = 2 ( l + 10 ) cm

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• $\dashrightarrow$20 = l + 10 cm

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• $\dashrightarrow$l = 10 cm

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• Length of rectangle 10 cm

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$\blue\bigstar$Note :

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• $\dashrightarrow$Kindly view answer from brainly.in for clear view of diagram !

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