50дм 5 M

It seems like you may be indicating two measurements: "50 дм" (decimeters) and "5 m" (meters). To clarify these measurements:

1. 50 дм (decimeters) can be converted to meters:

   • Since 1 meter = 10 decimeters, 50 decimeters = 50 / 10 = 5 meters.

2. 5 m is already in meters.

So, both measurements actually refer to the same length, which is 5 meters. If you have any specific questions or contexts you need further help with, feel free to ask!