the width of a rectangle is 6ft. find the perimeter of the rectangle if it's area is 42 square feet.

2 answers:

5 0

A=l x w
substitute
42=l x 6
7=l
Perimeter of a rectangle is 2l +2w
2(6)+ 2(7)
12+14=26ft is the perimeter

Hope this helps

katrin2010 [14]3 years ago

4 0

Formula: Area = length * width
Substitute in what you know: 42 = length * 6
Divide both sides by 6 to get the length: length = 7

Formula: Perimeter = 2 (length + width)
Substitute in what you know: P= 2 (7+6)
Solve: Perimeter = 26 ft

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