A gear with 45 teeth rotating at 400 RPM is driving a second gear with 75 teeth.How fast is the driven gear rotating?
A) 120 rpm
B) 240 rpm
C) 400 rpm
D) 750 rpm

Question

Quizplus · Accepted Answer

The speed of the driven gear can be calculated using the gear ratio. The gear ratio is the inverse of the teeth ratio: (45/75). Multiply this ratio by the driving gear's RPM: (45/75) * 400 = 240 RPM.

A Gear with 45 Teeth Rotating at 400 RPM Is