Answer :
Answer:
21 mph is answer
Step-by-step explanation:
follow me pls and when you multiply you 18 you get
60 minutes / 18 = 3.3333 repeating That’s how many of his 18-minute intervals are in 1 hour
Multiply that by the 3 miles he can run in each 18 minute interval
3.33333 x 3 = 10mph
Multiply that by the 3 miles he can run in each 18 minute interval
3.33333 x 3 = 10mph