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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 6 - No. 29)

If the perimeter of a rectangle is 2l + 2w, and the length is 7 and the width is 3, what is the perimeter?
10
14
20
21

Explication

Perimeter = 2(7) + 2(3) = 14 + 6 = 20

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