The perimeter of a rectangle is 120 inches. The length is 10 more than the width. Find the length and width

asked Jul 8, 2019 16.3k views

5 votes

by Yoape

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7 votes

The formula of a perimeter of a rectangle:

P=2(l+w)

We have:

$P=120\ in\\\\l=w+10$

Substitute

$2(w+10+w)=120\\\\2(2w+10)=120\ \ \ \ |:2\\\\2w+10=60\ \ \ \ |-10\\\\2w=50\ \ \ \ |:2\\\\w=25\\\\l=25+10=35$

TommyLike answered Jul 13, 2019

8.3k points

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