Question

The perimeter of a rectangle is 42 inches. If the width of the rectangle is 6 inches, what is the length?

Answer 1

Answer:

15 inches

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Step-by-step explanation:

Perimeter = 2( l + b)

42 = 2(l +6)

42 = 2l + 12

42 - 12 = 2l

2l = 30

l = 15

Answer 2

Step-by-step explanation:

Perimeter = Length + Width + Length + Width

 or

      P = 2L + 2W

If P=42 inches and W = 6 inches,

     42 = 2L + 2(6)

     42 = 2L + 12

     30 = 2L              [subtract 12 from both sides]

     L= 15              [divide both sides by 2]

Length is 15 inches