29)
Perimeter = 860
Width =x ft
Length 2x-65
Perimeter = 2((2x-65)+x)
Perimeter = 2( 2x-65+x)
Perimeter = 4x-130+2x
860 =6x-130
860 + 130 = 6 x
990 = 6 x
x= 165 ft Width
Length = 265 ft
30)
' l ' represents length
520 = 2(l + (l/2)+20)
solving for 'l' we have l=160
(160/2)+20 = 80+20 = 100
the length of the top floor is 160 ft and its width is 100 ft
