Respuesta :

calculista

Answer:

The wide of river is [tex]50\ ft[/tex]

Step-by-step explanation:

In this problem we know that

Triangles DEG and DEF are congruent by ASA (Angle-Side-Angle) Congruence

therefore

EG=EF

[tex]EG=20*(2\frac{1}{2})=20*\frac{5}{2}=50\ ft[/tex]