To solve this problem we must use the trigonometric relations, in this case as we have the ramp and the height the concentric trigonometric property to the [tex]sin\theta[/tex] will allow us to find the angle.
The sine of angle A, is defined as
[tex]Sin A = \frac{BC}{AC}[/tex]
[tex]Sin \theta = \frac{35}{225}[/tex]
[tex]Sin \theta = 8.9\°[/tex]
Therefore the angle of elevation is 8.9°
