if i have a 34 foot vehicle that needs to enter a building throw a 15 foot door and there is a slope of 2 feet to 0 feet what is the distance the slope must have to allow the vehicle to enter

Do you have a figure or other explanations that show that:

1. the length of the vehicle is 34 feet
2. the height of the vehicle is 15 feet (or probably less), and
3. the longitudinal slope of the entrance is 2 feet in 10 feet (check typo).
4. Geometry of the vehicle, such as the distance between the front-most and rear-most axles (wheels), the distance between the front of the vehicle and the first axle.

Also, have you done sine-rule and cosine rule?