When Cara drives to work, it takes her 30 minutes to drive 15 miles. On her days off, she likes to drive to her favorite donut shop. It takes Cara 6 minutes to drive to The Dreamy Donut Shop at the same rate.

How many miles away is The Dreamy Donut Shop?
miles

1 answer

Since Cara drives 15 miles in 30 minutes, her rate is 15 miles / 30 minutes = <<15/30=0.5>>0.5 miles per minute.
Therefore, since it takes her 6 minutes to drive to The Dreamy Donut Shop at the same rate, the shop must be 0.5 miles/minute * 6 minutes = <<0.5*6=3>>3 miles away. Answer: \boxed{3}.