Considering the inductor as the load, what is the Thevenin resitance of this circuit? I would have thought it is 15Ω, however, the answer is written as 30Ω.

Any help/clarification appreciated,
Cheers!

 

Hm, for me Rth = 15Ω

 

Thanks, it's a trivial question but now I can dismiss the answer given as an error.

 

Yes, the answer is wrong, correct answer is 15 ohms