Question

Its asking for the approximate depth of the river. but I don't know how to determine that

Answer 1

From figure, trngles VWX and VYZ are similar.

So, the ratio of corresponding sides of triangles will be equal. Hence,

`\begin{gathered} (VW)/(VY)=(WX)/(YZ) \\ (3)/(62)=(5)/(d) \\ d=(5*62)/(3) \\ =103.3\text{ m} \end{gathered}`

Therefore, the approximate depth of the river is d=103.3 m.