Question

8. If perimeter of a rectangle is 40 cm and length is
12 cm, then its breadth is​

Answer 1

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

hope it's helpful

Mark me as branlist

give thanks to my answer

Answer 2

Answer :

• Breadth of rectangle is 8cm.

Given :

• Perimeter of rectangle is 40cm
• Length of rectangle is 12cm

To find :

• Breadth of rectangle

Solution :

As we know that

• Perimeter of rectangle = 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 , Breadth of rectangle is 8cm.

Verification :

• Length is 12cm
• Breadth is 8cm
• Perimeter is 40cm

As we know that,

• Perimeter of rectangle = 2(l + b)

》40 = 2(12 + 8)

》40 = 2(20)

》40 = 40

Hence Verified