A motorboat goes $12$ km upstream and then comes back to the starting point in a total of $3$ hours. If the speed of the stream is $3$ km/h, find the speed of the motorboat in still water.

Options:

• A: $9$ km/h
• B: $10$ km/h
• C: $8$ km/h
• D: $12$ km/h

Related Practice Questions:

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