Question

what is the gear ratio for this gear train? 3/12 (image of gear train) options: 3:1, 24:1, 1:12, 6:2

Explanation:

Step1: Simplify the fraction

To find the gear ratio, we simplify the fraction $\frac{36}{12}$.
We divide the numerator and the denominator by their greatest common divisor, which is 12.
$\frac{36\div12}{12\div12}=\frac{3}{1}$

Step2: Convert to ratio form

The fraction $\frac{3}{1}$ in ratio form is $3:1$.

Answer:

3:1