Answer:
78
Step-by-step explanation:
Remark
There are two similar triangles in the diagram: ΔYZX and ΔVWX.
That being true a ratio can be set up as
VW / ZY = WX / XZ
Givens
VW = 104
ZY = 8
WX = ?
XZ = 6
Solution
104 / 8 = WX / 6
104 * 6 / 8 = WX
WX = 78
So the width of the lake is 78 meters
