The amount of unused length in the main rectangle:
LengthI = 240'
Current Length Used = I * SLength = 15 * 16' = 240'
Current Unused Length = LengthI - Current Length Used = 240' - 240' = 0'
Therefore, one can not change the length of
the parking lot in the main rectangle without changing the optimal
solution.
The amount of unused length in the edges:
LengthI = 240'
Current Length Used = I * SWidth = 30 * 8' = 240'
Current Unused Length = LengthI - Current Length Used = 240' - 240' = 0'
Therefore, one can not change the length of
the parking lot in the main rectangle without changing the optimal
solution.
The amount of unused width:
WidthJ = 268'
Current Width Used = J * SWidth = 33 * 8' = 264'
Current Unused Width = WidthJ - Current Width Used = 268' - 264' = 6'
Therefore, one can decrease the lot width
by up to 4' or increase the lot width by up to 4' (8' - 4') without
changing the optimal solution.
Conclusion:
One can decrease the lot width by 4', or increase the lot width by 4' without changing the optimal solution.