9. A boat travels at 8 km/h upstream and at 14 km/h downstream. Find the speed of the boat in still water and the speed of the stream.
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In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.
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A boat travels at 8 km/h upstream and at 14 km/h downstream. Find the speed of the boat in still water and the speed of the stream.
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