Posted by Karen on .
A boat needs to travel straight across a river. The current is 10 km/hr. The boat can travel at 16 km/hr. What is the velocity of the boat relative to the bank?

Physics help ASAP please 
bobpursley,
If the boat is headed upstream, so that it moves directly across the stream, then
sinTheta=10/16 where theta is the angle upstream frm the line across.
then velocity across= 16cosTheta 
Physics help ASAP please 
sibusiso,
a boat can travel 3m/s in still water. a boatman wants to cross a river while covering shortest distance. how long will it take him to cross the river if speed of water is (a) 2m/s (b) 4 m/s