your are building a soccer field. the length has to be 30 m longer than the width, and the total perimeter must be between 320i m and 360 m.

Answer 1

width ---- x m
length ---- x+30

320 < 2x + 2(x+30) < 360
320 < 4x + 60 < 360
260 < 4x < 300
65 < x < 75