A jet boat is used to take canoers 200 miles upriver to their starting point. As the driver of the jet boat, Jeremy knows that it will take him 5 hours to get the canoers upstream, but only 4 hours to get the boat back downstream after dropping the canoers off, as long as he keeps the boat moving at a constant speed. How fast would the boat be moving in still water?
A. 5 mph
B. 40 mph
C. 45 mph
D. 50 mph

Question

A jet boat is used to take canoers 200 miles upriver to their starting point. As the driver of the jet boat, Jeremy knows that it will take him 5 hours to get the canoers upstream, but only 4 hours to get the boat back downstream after dropping the canoers off, as long as he keeps the boat moving at a constant speed.    How fast would the boat be moving in still water? 
A. 5 mph 
B. 40 mph 
C. 45 mph 
D. 50 mph