Carol H. answered • 02/04/18

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**Let x = the width**

**Let x + 6 = the length**

**P =2l + 2w**

**40 = 2(x + 6) + 2x**

**40 = 2x + 12 + 2x**

**28 = 4x**

**7 cm = x**

**length: x + 6 = 7 + 6 = 13**

**A = lw**

**A = 13(6)**

**A = 78 cm**

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