a boat travels 8km upstream and back in 2 hours. if the current flows at a constant speed of 3kmh, find the speed of the boat in still water. (Hint : when the boat goes upstream, its speed reduces by 3kmh and when going downstream, its speed increases by 3kmh)

Question

atlas · Answer

let the speed of boat be x km/hr
while going upstream, speed of boat becomes : x-3
while going downstream, speed of boat become x+3

atlas · Answer

total time taken = 8/(x-3) + 8/(x+3) = 2 hours
Solve for x

atlas · Answer

I have used time = distance / speed

anonymous · Answer

thanks :)

atlas · Answer

you are welcome