SOLUTION: A boat takes 5 hours to go 300 km downstream and it takes same time to go 150 km upstream. calculate the speed of boat in still water and speed of stream.
Question 473625: A boat takes 5 hours to go 300 km downstream and it takes same time to go 150 km upstream. calculate the speed of boat in still water and speed of stream. Found 2 solutions by Alan3354, lwsshak3:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! 300/5 = 60 km/hr
150/5 = 30 km/hr
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The boat's speed is the average = (60 + 30)/2 = 45 km/hr
The current is the difference = 15 km/hr
You can put this solution on YOUR website! A boat takes 5 hours to go 300 km downstream and it takes same time to go 150 km upstream. calculate the speed of boat in still water and speed of stream
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let x=speed of boat in still water
let y=speed of stream
speed=distance/travel time
travel time same for downstream and upstream
300/5=x+y
150/5=x-y
60=x+y
30=x-y
add
2x=90
x=45
y=60-45=15
ans:
speed of boat in still water=45 km/hr
speed of stream=15 km/hr
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