What is the minimum length of a wheelchair ramp, if it must rise a height of 1.2 m at a maximum angle of 9.3° above the horizontal?
a. 1.22 m
c. 7.43 m
b. 0.19 m
d. 7.33 m
To find the minimum length of a wheelchair ramp, we can use the formula:
Length = height / sin(angle)
Given: height = 1.2 m, angle = 9.3°
Substituting the values into the formula, we have:
Length = 1.2 / sin(9.3°)
Using a calculator, sin(9.3°) ≈ 0.161
Length = 1.2 / 0.161 ≈ 7.45 m
Therefore, the minimum length of the wheelchair ramp is approximately 7.45 m.
The closest option is c. 7.43 m.