A rectangle has an area of 12cm². The length of one side is 4cm. What is the perimeter of the rectangle?

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  • ?
    Lv 7
    3 weeks ago
    Favorite Answer

    Area = L x W = 12 cm²

    ........⇒ L = 12 cm² / W

    ....................W = 4 cm

    ........⇒ L = 12 cm² / (4 cm)

    ........⇒ L = 3 cm

    Perimeter = 2 (L + W)

    .................= 2 (3 cm + 4 cm)

    .................= 2 (7 cm)

    .................= 14 cm.................ANS

    • Tacitus3 weeks agoReport

      Yes this is the right answer .It was a question on the Royal Navy Numeracy test....(its online) I just couldn't work it out   

  • 3 weeks ago

    about 6 inches........

  • Lôn
    Lv 7
    3 weeks ago

    The sides are 4,3,4 and 3

    Area = 4 x 3 = 12 sq cm

    Perimeter = 4 + 3 + 4 + 3 = 14 cm.

  • 3 weeks ago

    A rectangle has an area of 12 cm².

    The length of one side is 4 cm.

    The perimeter of the rectangle is 14 cm.

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  • Anonymous
    3 weeks ago

    The area of the rectangle is the length x the width

    So .. 12 = 4 x ?

    ? = 12/4

    ? = 3

    So .. the perimeter is 3 + 3 + 4 + 4 = 12cm

    • Tacitus3 weeks agoReport

      For Fun I was doing the Royal Navy Numeracy test....(you can find it online) The correct answer was 14....The other possible answers were 18,16, and 24......Thanks for trying I didn't have a clue how to work it out    

  • David
    Lv 7
    3 weeks ago

    The other side of the rectangle is 3cm and its perimeter is 3+4+3+4 = 14cm

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