a building foundation has a length of 82 feet and a perimeter of 240 feet. what is the width

Question

stuck on this question

Answer 1

The width is 38, because the length is given we know the perimeter=l+w+l+w. The perimeter is 240, so 82+w+82+w=240.

 

Therefore 82+38+82+38=240

Answer 2

if w is the width, then 2(length + w)= 240

thus,  length + w = 120

w = 120- length =120- 82 = 38

the width is 38 ft.