1 . A man can cross 10 miles distance of a river in favor of the stream in 2 hours. He can come back against the stream along the same way in 5 hours. What is the average speed, in miles per hour, for the entire trip?

• A. 20/7
• B. 10/7
• C. 7/10
• D. 7/20

Answer: Option A

Explanation: