Answer:
Jason need to trim is 65 feet
Explanation:
We are given
The room is 14 feet wide and 20 feet long
so, length is 20 feet

width is 14 feet
so,

now, we can find perimeter
P=2L+2W


There is a door opening that is 3 feet wide
So, Jason need to trim
=68-3 feet
=65 feet