Question 548969
Area of picture frame =24*15 = 360 m^2

let the uniform width be x on length & width on each side

width of picture = 15-2x
length of picture = 24-2x

(15-2x)(24-2x)=220

360-30x-48x+4x^2=220

360-220-78x+4x^2=0

4x^2-78x+140=0
/2
2(2x^2-39x+70)=0

2(2x^2-35x-4x+70)=0
2(2x(x-17.5)-2(2x-35))=0

2((x-17.5)(x-2))=0

Neglect 17.5 since it is greater than width
so width = 2feet

m.ananth@hotmail.ca