A. 10% of wall area
B. 20% of wall area
C. 30% of wall area
D. 50% of wall area
Correct Answer: 20% of wall area ✔
Last Updated: January 20, 2019
A. 10% of wall area
B. 20% of wall area
C. 30% of wall area
D. 50% of wall area
Correct Answer: 20% of wall area ✔
Last Updated: January 20, 2019