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Answered by
Goran Z #1163728
Pt=81m²
h=5m
Pw=?
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Pt=a*a
a=√Pt
a=9m
Pw=a*h
Pw=45m²
Area of one wall is 45 square meters.
Source(s)
Math for the Ages!: SAT and High School Math Kishore Mishra (Author), Binapani Mishra (Author)