Quote:
Originally Posted by burgess
Required help to solve math homework problems
What is the time taken by the boat to go to 68 km downstream, If a boat can travel with a speed of 13 km/hr in still water and the speed of the stream is 4 km/hr?

Since the boat is headed downstream we can add the rate of the boat in still water to the rate of the stream giving us a combined rate of 17 km/hr.
distance = rate x time
68 km = 17 km/hr x time
68/17 hr = time
4 hrs = time.