Relavtivity Question - Unit Needed

[TheController]

1. The problem

I need to know what unit I would use for my calculated velocity?

2. Relevant Information

T (Relative Time) = 9 years
To (Stationary Time) = 2 years
U (Velocity) = ?

Solution?

What unit would I use for the velocity received?

 

[rude man]

1. The problem

I need to know what unit I would use for my calculated velocity?

2. Relevant Information

T (Relative Time) = 9 years
To (Stationary Time) = 2 years
U (Velocity) = ?

Solution?

What unit would I use for the velocity received?

The factor relating T to To will contain the ratio v/c, so you can use the speed of light as your unit, or you can say c = 3e8m/s and get the answer in m/s.

Etc.