Rita’s boat has a top speed of 12 miles per hour in still water. While traveling on a river at top speed, she went 20 miles upstream in the same amount of time she went 40 miles downstream. Find the rate of the river current.

Answer 1

time=distance/velocity

upstream=time dowstream
time=20/(12-c)=40/(12+c)

24-2c=12+c
12=3c
c=4mi/hr

Answer 2

post it.