Autumn takes 20 minutes to walk 1 mile from MCJH to Walmart. She stands in the parking lot for 2 minutes and runs for 10 minutes for 1 more mile towards home.

Question

What is Autumn's average speed?

Answer 1

Average speed = distance / time 

(1 mi + 0 mi + 1mi) / (20 min + 2 min + 10 min) = 2 mi / 32 min

convert miles per minute into miles per hour

(2 mi / 32 min) (60 min / 1hr) = 3.75 mph