Answer: The numerical length of
is 20 units.
Step-by-step explanation:
Given: Point T is on line segment
.
i.e.
(i)
Since , it is given that ST=2x+6,TU=4, and SU=4x
Substitute these values in (i), we get

Now, the numerical length of 
Hence, the numerical length of
is 20 units.