Question

The length of a rectangle is 12 cm and its perimeter is 34 cm. Find the breadth of the rectangle​

Answer 1

Answer:

perimeter of rectangle = 2×(l+b)

34cm= 2×(12+b)

34=24 + 2b

2b = 34-24

2b = 10

b= 10/2

b = 5cm

Answer 2

$\sf{\bold{\green{\underline{\underline{Given}}}}}$

• length = 12cm
• perimeter = 34cm

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$\sf{\bold{\green{\underline{\underline{To\:Find}}}}}$

• breadth = ??

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$\sf{\bold{\green{\underline{\underline{Solution}}}}}$

$\sf{\red{\boxed{\bold{perimeter = 2 ( length + breadth ) }}}}$

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$\sf:\implies\:{\bold{ 34 = 2 ( 12 + b ) }}$

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$\sf:\implies\:{\bold{ 12 + b = \dfrac{34}{2}}}$

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$\sf:\implies\:{\bold{ 12 + b = 17}}$

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$\sf:\implies\:{\bold{ b = 17 - 12}}$

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$\sf:\implies\:{\bold{ b = 5 }}$

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$\sf{\bold{\green{\underline{\underline{Answer}}}}}$

• breadth of the rectangle is 5cm