SOLUTION: The speed of a boat in still water is 28 miles per hour. The boat traveled 70 miles downstream in the same amount of time that it took to travel 42 miles upstream. What is the rate

Algebra ->  Rate-of-work-word-problems -> SOLUTION: The speed of a boat in still water is 28 miles per hour. The boat traveled 70 miles downstream in the same amount of time that it took to travel 42 miles upstream. What is the rate      Log On


   



Question 604214: The speed of a boat in still water is 28 miles per hour. The boat traveled 70 miles downstream in the same amount of time that it took to travel 42 miles upstream. What is the rate of the current of the river?
Answer by flame8855(424) About Me  (Show Source):
You can put this solution on YOUR website!
let c be the speed of the current
28 +c = 70/t
28-c = 42/t
56= 112/t
t=2
28+c= 70/2 =35
c=7mph