Question: 
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?
7/10
7/20
20/7
20/7
10/7
Answer: 
20/7
Last Updated: 
08/11/2021 - 03:30