A boat on a river travels downstream between two points, 70 mi apart, in one hour. The return trip against the current takes 2 1/2 hours. What is the boat's speed (in still water)?
How fast does the current in the river flow?
Diagram: http://www.webassign.net/scolalghybrid1/6-2-052-alt.gif
How fast does the current in the river flow?
Diagram: http://www.webassign.net/scolalghybrid1/6-2-052-alt.gif