Resistance grows with temperature

[Karol]

Homework Statement

The copper windings in an electric motor have a resistance of 54[Ω] at 20⁰.
Later the resistance was 60[Ω], what is the temperature

Homework Equations

$$R_1=R_0(1+\alpha t_1)$$
α=0.00393[1/⁰]

The Attempt at a Solution

At 0⁰C R₀ is: $54=R_0(1+0.00393\cdot 20)\rightarrow R_0=50.06$
$60=50.06(1+0.00393\cdot t_2)\rightarrow t_2=50.5^0$
It should be t₂=286⁰C

 

[Bystander]

And your question is what?

 

[Karol]

If i am right and the book is wrong.

 

[Bystander]

Your math looks good. Books have been known to be in error.

 

[Karol]

Thanks and now i saw i read the wrong answer in the book, but thanks anyway for the effort