Problema Solution
The current in a stream is 4 km/h. A boat travels 24 km upstream and 24 km downstream in a total time of 8 hours. What is the speed of the boat in still water? (use the four step: statement, equation, work, answer in words.
Answer provided by our tutors
24/(x+4) + 24/(x - 4) = 8
6x = x2 - 16
x2 - 6x - 16 = 0
(x - 8)(x + 2) = 0
x = 8 Km/h = speed of the boat in still water