Answer:
220 cm
Step-by-step explanation:
Multiply length x width x height
22 x 5 x 2
110 x 2
c
4x^2+10x-2=0
So the total area of mirror: 2*3 = 6 ft sq
8-6 = 2 ft sq is the area of the frame
x is the thickness of the frame
so we have (2*x)*2+(3*x)*2+x*x*4= 2
4x+6x+4x^2=2
-> 4x^2+10x-2=0
