$\"\"$

From the diagram,

The length of the access ramp is 4 m.

The angle that the access ramp makes with the ground is $\"\"$ .

The horizontal distance that the ramp covers is d m.

$\"\"$

d is adjacent to $\"\"$ and hypotenuse is $\"\"$ .

$\"\"$ (Definition of cosine ratio)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Use a calculator to approximate $\"\"$ )

$\"\"$ (Multiply each side by $\"\"$ )

$\"\"$ (Cancel common terms)

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Nearest tenth value) \ \

$\"\"$

The horizontal distance that the ramp covers is 4.0 m.