50
55
60
65
Answer is Wrong!
Answer is Right!
The correct answer is B. 55.
The velocity ratio of a machine is the ratio of the distance moved by the effort to the distance moved by the load. In this case, the effort moves 650 cm and the load moves 13 cm, so the velocity ratio is 650/13 = 55.
The velocity ratio is a measure of the mechanical advantage of a machine. A machine with a high velocity ratio has a greater mechanical advantage, which means that it can lift a heavier load with less effort.
The other options are incorrect because they do not represent the correct ratio of the distance moved by the effort to the distance moved by the load.