Question

8) A boat traveled 336 miles downstream and back. The trip downstream took 14 hours. The trip back took 84 hours. What is the speed of the boat in still water? What is the speed of the current?​

Answer 1

speed of a boat when it goes downstream is 336/12 = 28 mi/h

speed of a boat when it goes upstream is 336/14 = 24 mi/h

Let v is speed of the boat in still water and x is speed of the current. Then,

v + x = 28

v - x = 24

Solve the system for v and x and get v = 26 mi/h, x = 2 mi/h

Explanation: