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8. If perimeter of a rectangle is 40 cm and length is

12 cm, then its breadth is

Question

8. If perimeter of a rectangle is 40 cm and length is

12 cm, then its breadth is

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Mathematics
3 months
2021-07-19T20:29:20+00:00
2021-07-19T20:29:20+00:00 2 Answers
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## Answers ( )

Answer:8 cm

Step-by-step explanation:Given that

P = 40, l = 12

As we know that

Perimeter of Rectangle (P) = 2 * (length + breadth)

ie. P = 2*(l+b)

=> 40 = 2 * (12 + b)

=> 40 / 2 = [2*(12 + b)]/2 (Divide both side by 2)

=> 20 = 12 + b

=> 20 – 12 = 12 – 12 + b (Subtract 12 from both side)

=> 8 = b

=> b = 8

Ans: Breadth is 8cm

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Answer:Given:Tofind:Solution:AsweknowthatPerimeterofrectangle=2(l+b)Where , l is length and b is breadth

》Perimeter of rectangle = 2(l + b)

》40 = 2(12 + b)

》12 + b = 40/2

》12 + b = 20

》b = 20 – 12

》b = 8cm

Hence,Breadthofrectangleis8cm.## Verification :

As we know that,

》40 = 2(12 + 8)

》40 = 2(20)

》40 = 40

HenceVerified