Question

Two gears are connected and rotating at the same time. The smaller gear completes 2 1/2 rotations every time the larger gear completes 1/4 of a rotation.

How many rotations does the smaller gear complete when the larger gear completes 1 rotation?


A.1/10

B. 5/8

C. 5

D. 10

Answer 1

The small does 2 1/2 for 1/4 of the large. Multiply by 4 to get a full rotation of the large one:

2 1/2 x 4 = 10

answer: D. 10