Answer:
x = 5.26 m
Explanation:
Given that,
The angle of inclination = 20°
The vertical height of the ramp, h = 1.8 m
We need to find the length of the ramp. Let it is x.
We can find it using trigonometry. So,

We have,
P = 1.8 m, H = x

So, the length of the ramp is 5.26 m.