Actually I think I have it now.
where w = width and l = length.
1. w=l-0.15
2. 16l+15w=40
Substituting into Eq 2
16l+15(l-0.15)=40
16l+15l-2.25=40
l=1.36m
Therefore:
w=1.36-0.15=1.21m
So overall room dimensions are 3w=3.63m and 4l=5.44m
That seems to work out and follow fairly sensible...
Homework Statement
Twelve equal rectangular ceiling panels are placed in a four long by three wide grid. Each panel is 150mm longer than it is wide. Between the panels runs an edge/middle strip which totals 40.0m in total length. (This runs round the whole perimeter and between each panel)...