A boat goes 20 km upstream in 2 hours and downstream in 1 hour. how much time this boat will take to travel 30 km in all still water?
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speed of the boat=x km/h
speed of the stream=y km/h
2(x-y)=20
x_y=10
1(x+y)=20
x+y=20
solving we get
x=15, y=5
required time =30/15=2hrs
MARK AS brainliest plz
speed of the stream=y km/h
2(x-y)=20
x_y=10
1(x+y)=20
x+y=20
solving we get
x=15, y=5
required time =30/15=2hrs
MARK AS brainliest plz
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