Answer: They hike 30 miles and 20 miles in 1 hour respectively and they hike 60 miles and 40 miles in 2 hours respectively.
Step-by-step explanation:
Since we have given that
Number of mile Jeff hikes in every 15 minutes =
As we know that
1 hour = 60 minutes
So, number of mile Jeff hikes in every 1 hour =
number of miles Jeff hikes in every 2 hours =
Number of miles Lisa hikes in every 10 minutes =
Number of miles Lisa hikes in every 1 hour =
Number of miles Lisa hikes in every 2 hours =
Hence, they hike 30 miles and 20 miles in 1 hour respectively and they hike 60 miles and 40 miles in 2 hours respectively.