Submitted by examrobotsa on Thu, 01/01/1970 - 05:30 In a lifting machine, the efforts required to lift loads of 200 N and 300 N are 50 N and 60 N respectively. The maximum efficiency which can be expected from this machine is (given, velocity ratio = 20)30% 45%50%60%stats: 0,0,32,8,0,24,0