Question

in still water , your small boat averages 8 miles per hour. it takes you the same amount of time to travel 15 miles downstream , with the current , as 9 miles upstream , against the current. what is the rate of the water's current?

Answer 1

in still water, a boat averages 8 miles per hour. It takes the same amount of time to travel 30 miles downstream, with the current, as 18 miles upstream, against the current. What is the rate of the water's current.

Explanation:

Let c=speed of current in mph

c+8=speed of boat downstream in mph

c-8=speed of boat upstream in mph

Travel time= distance/speed

30/8+c=18/8-c

240-30c=144+18c

48c=96

c=2 mph

ans

rate of water's current = 2 mph