Question

question 55 of 100 · multiple choice

the ratio of a gear that turns 300 rpm to a gear that turns 20 rpm is stated as?

a 30 to 20
b 15 to 1
c 3 to 2
d 20 to 30

Explanation:

Set up the initial ratio

$$ \text{Ratio} = 300 : 20 $$

Simplify the ratio by dividing by the greatest common divisor

$$ \text{GCD}(300, 20) = 20 $$

$$ \frac{300}{20} : \frac{20}{20} = 15 : 1 $$

Answer:

• (A) 30 to 20
• (B) 15 to 1 (Correct answer)
• (C) 3 to 2
• (D) 20 to 30