Step-by-step explanation:
let angle of incline be represented by alpha
[tex] \tan( \alpha ) = \frac{60}{340} [/tex]
[tex] \alpha = \tan( \frac{60}{340} ) [/tex]
(note that above, inverse tan (tan to the power of -1 is used)
[tex] = 10.0079798[/tex]
= 10 degrees ( nearest degree)