Solution: Let the length and width be 5m and 2m respectively.
According to the meaning of the question
5a+2a×2=48 (wall as width at this time)
9a=48
a= 16/3
Length = 80/3m
Width = 32/3m
Area = 80/3×16/3 =1280/9 m2.
or
5a×2+2a=48
12a=48
a=4
Length = 20m
Width = 8m
Area = 20× 8 = 160m2.
for reference only