Q: A boat can travel 10 km upstream and 20 km downstream in 7 hours. It can travel 20 km upstream and 10 km downstream in 11 hours. What is the speed of boat in still water?
A.
2 km/h
B.
8 km/h
C.
6 km/h
D.
4 km/h
Correct Answer:
Option C -
Explanations:
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