Answer: There are 45 yards of cable that will be required.
Step-by-step explanation:
Since we have given that
Height of cable = 16 yards - 4 yards = 12 yards
Distance from pole = 9 yards
cable is the hypotenuse of the right angled triangle.
So, it becomes,

Since , number of cable supported = 3
So, Number of yards of cable that will be required would be

Hence, there are 45 yards of cable that will be required.