Answer:
Hence, CE=10
Explanation:
" Triangle Proportionality Theorem: If a line parallel to one side of a triangle intersects the other two sides, then it divides those sides proportionally "
i.e.
Here we have:
BC||DE. (i.e. BC is parallel to DE).
Hence we have:

Here we have:

Hence,

Hence, the length of CE is 10 units.