Let x = DC.

Since ∆ABE is similar to ∆CED. The lengths of their corresponding sides are in proportion.

X / 60 = 80 / 48

48x = 80(60) = 4800

x = 4800 / 48= 100 ft.

Since ∆ABE is similar to ∆CED. The lengths of their corresponding sides are in proportion.

X / 60 = 80 / 48

48x = 80(60) = 4800

x = 4800 / 48= 100 ft.