Calculating Current for 1.5T in Solenoid

[JonJon]

Homework Statement

Solenoid is 1.8m long and 75 cm in diam. one layer tightly wound with wire that has diam 2mm. what current needs to run thru to get 1.5T

Homework Equations

N=2piR/(L) where R is radius of solenoid and L is wire lenght

The Attempt at a Solution

Once I find how many rolls I can solve the problem. I need help finding this

 

[Mindscrape]

How many times does 2 mm go in 1.8 m? Or think of it in terms of dimensional analysis. You've got 1turn/2mm.