Which of the following has greatest mechanical advantage

Question

Load=150N, EFFORT =25N
Load=685N, EFFORT =1235N
Load =147, EFFORT =30 N

Answer 1

Please answer

Answer 2

Answer B
Load 685N effort 1235 N

Answer 3

A load of mass 80kg was lifted a distance of 12m if the effort applied to lift the load was 60m to the height of 30m calculate the work output by a machine