determine the average speed of the current in a river if a boat with Stillwater speed of 20 miles per hour takes 3 hours to travel 78 miles downstream.

Question

Please help me I reall y need this

Answer 1

(20+C)(3) = 78 (speed times time = distance)

60+3C = 78

3C = 18

C = 6 mph = speed of the current

20+6 = 26

26 x 3 hours = 78 miles