A rectangular hall has 10 m long and 7 m broad. A carpet is spread in the centre leaving a margin of 1 m near the walls. Find the area of the carpet. Also find the area of the un covered floor.
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Length of hall,L=10m
breadth of hall,B=7m
Length of carpet, l = Length of hall- margin = 10-1=9m
breadth of carpet, b = breadth of hall - margin = 7-1=6m
area of carpet = l×b
= 6×9= 54 m^2
area of the uncovered floor = L×B - l×b
= 7×10 - 6×9
=70 -54 = 16 m^2
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