Question 425733
(18-2w)(14-2w)=192
252-64w+4w2=192
4w2-64w+60=0
w2-16w+15=0
(w-15)(w-1)=0
w=15 or 1
Throwing out 15 as too wide, the width of the frame is 1 cm.
16x12=192..