Answer:
4
Explanation:
The ideal mechanical advantage of an inclined plane can be calculated as
[tex]\text{ ideal mechanical advantage = }\frac{\text{ Input distance}}{\text{ Output distance}}[/tex]So, replacing input distance = 12 m and output distance = 3 m, we get:
[tex]\text{ ideal mechanical advantage = }\frac{12\text{ m}}{3\text{ m}}=\text{ 4}[/tex]Therefore, the answer is 4.