3. A boat can move at a speed of 10 mph in still water. The helmsman steers the boat east across a river 20 miles wide in which the current flows south at 4 mph. What is the boat’s velocity? How long does it take to cross the river? How far downstream of its starting point does it land?

Question

3.	A boat can move at a speed of 10 mph in still water. The helmsman steers the boat east across a river 20 miles wide in which the current flows south at 4 mph. What is the boat’s velocity? How long does it take to cross the river? How far downstream of its starting point does it land?

azureilai · Answer

|dw:1381201587384:dw| Lets work with this picture in mind first