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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Caroline 3 months 2021-07-19T20:29:20+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-07-19T20:30:31+00:00

    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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    0
    2021-07-19T20:31:19+00:00

    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

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