A boat can travel 18 km in 3 hours while going upstream and 40 km in 4 hours while going downstream. What is the speed of the boat in still water?

Q: A boat can travel 18 km in 3 hours while going upstream and 40 km in 4 hours while going downstream. What is the speed of the boat in still water?

Correct Answer: Option B -

Explanations:

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