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15 February, 19:46

A large rectangle is made up of 3 smaller identical rectangles, the perimeter of one small rectangle is 21cm. What is the perimeter of the large rectangle.

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  1. 15 February, 20:14
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    63 units

    Step-by-step explanation:

    If the perimeter of 1/3 of the rectangle is 21, multiply 21 by 3 to find the perimeter of the entire rectangle.

    21 x 3 = 63
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