Answer:
25 units
Build a proportional equation:
[tex]\rightarrow \sf \dfrac{CE}{CD} = \dfrac{CB}{AC}[/tex]
[tex]\rightarrow \sf \dfrac{CE}{20} = \dfrac{35}{28}[/tex]
[tex]\rightarrow \sf CE = \dfrac{(20)35}{28}[/tex]
[tex]\rightarrow \sf CE = \dfrac{700}{28}[/tex]
[tex]\rightarrow \sf CE =25[/tex]
