The length of the strapping needed to attach a pipe to the wall would be = 30.76in.
How to calculate the length of the strapping needed?
To calculate the length of the strapping needed, the following steps should be taken as follows:
Given the diameter of the circle = 16in.
Hence the radius = diameter/2= 16/2= 8in.
Then,
Circumference of the circle = 2πr
C = 2×3.14×8
= 50.24 in
From the figure, the total length of the strapping will be;
L = ¼×C+2× radius of circle +2×1.10
= ¼×50.24+2×8+2×1.10
= 12.56+16+2.2
= 30.76 in.