Verified Answer :

The
mechanical advantage formula of lever is:

MA Lever = Fo (output force of lever) / Fi (input force)

=> We usually lever to make our work easier in lifting objects. In this
given situation, we need to find the mechanical advantage of a lever.

Given numbers:

=> Input arms = 4 meters

=> output arms = 0.8 meters

Now, let us solve by dividing the output arms and the input arms.

=> 0.8 meters / 4 meters

=> 0.2 meters

Thus, the mechanical advantage of lever is 0.2 meters.