Question 218152
let the length of the rectangle = l
and the width of the rectangle = w


perimeter <= 30
2*l + 2*w <= 30
(divide both sides by 2)
l + w <= 15
so, if l = 8 then
8 + w <= 15
w <= 15 - 8
w <= 7


so the width must not greater than 7 cm, or it can be said that the width is greater than 0 cm but less or equal with 7 cm (0 < width <= 7cm)