A. At the centre
B. At d/4 from the wall
C. At the wall
D. At d/8 from the wall
Correct Answer: At the wall ✔
Last Updated: March 10, 2019
A. At the centre
B. At d/4 from the wall
C. At the wall
D. At d/8 from the wall
Correct Answer: At the wall ✔
Last Updated: March 10, 2019