Magnetic Field Strength Calculation for a Solenoid with Given Parameters

[sphys4]

Homework Statement

A 10 cm long solenoid with 241 turns and radius R = 3.00 cm has a current flowing through it of Io = 200 mA. What is the magnetic field strength inside the solenoid (in T)?

The Attempt at a Solution

So i know i have to use the formula B = (uo)(n)(Io)

uo = a constant 1.257 x 10^-6
n = 241/.1 = 2410 N/L
Io = 200 mA or .2 A

So when plugging in B = (1.257x10^-6)(2410)(.2) = 6.06E-4
I am getting the wrong answer... can someone please tell me where i went wrong?

 

[rock.freak667]

I think it is correct. Are you sure you don't need to use μ₀=4π(10^-7)? Even though your answer would just change by a small number.