The gear ratio describes the ratio of one gear's diameter to another gear in the same chain. The gear ratio between two specific gears is 3 to 2. If the diameter of the larger gear is 18 cm, what is the diameter of the smaller gear?
A. 18 cm B. 24 cm
C. 12 cm D. 6 cm

Question

The gear ratio describes the ratio of one gear's diameter to another gear in the same chain.  The gear ratio between two specific gears is 3 to 2.  If the diameter of the larger gear is 18 cm, what is the diameter of the smaller gear?
A.	18 cm		B.	24 cm
	C.	12 cm		D.	6 cm

campbell_st · Answer

you can use equivalent fractions for this 

$$\frac{18}{x} = \frac{3}{2}$$

so 3 x ? = 18

multiply 2 by the same value to find x

anonymous · Answer

I don't under stand ive never been good with fractions.