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10 December, 00:57

The length of a rectangle is twice its breadth, the perimeter is 42 cm what is the length and the breadth?

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  1. 10 December, 03:44
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    Perimeter = p

    length = l

    breadth = b

    l = 2b

    p = 2l + 2b

    p = 4b = 2b

    p = 6b

    42 = 6b

    b = 42/6

    b = 7

    l = 2 x 7

    l = 14
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