A man can row a boat 1km with stream in 10 min and 1 km against the stream in 20 minutes. what is the speed of the boat in still water
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Answered by
1
Answer:
30km/h i think this should be correct
Answered by
2
Answer:
0.075 km / min. or 4.5 km/hour.
Step-by-step explanation:
Let the speed of the boat in still water be x km/minute and speed of the stream be s km/m.
Speed with the stream = 1/10 = 0.1 km/m and against it is 1/20 = 0.05 km/m.
So we have the system:
x + s = 0.1
x - x = 0.05
Adding:
2x = 0.15
x = 0.075.
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