Answer:
a.) 30 miles per hour
b.) 40 miles per hour
c.) 36 miles per hour
Step-by-step explanation:
a.) average speed = distance / time = 10 miles / 20 minutes = 30 miles /60 minutes = 30 miles / 1 hour
b.) average speed = distance / time = 20 miles / 30 minutes = 40 miles/ 60 minutes = 40 miles / 1 hour
c. ) average speed = distance / time = 30 miles / 50 minutes =
30 miles * (6/5) / 50 minutes * (6/5) = 36 miles / 60 minutes = 36 miles per hour
