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1961 AMC 12 Question 2

AMC12 · 1961 AMC 12

Question 2

An automobile travels $\frac{a}{6}$ feet in $r$ seconds. If this rate is maintained for $3$ minutes, how many yards does it travel in the $3$ minutes?
  1. $\dfrac{a}{1080r}$
  2. $\dfrac{30r}{a}$
  3. $\dfrac{30a}{r}$
  4. $\dfrac{10r}{a}$
  5. $\dfrac{10a}{r}$