Multiple choice

A boat can travel at a speed of 8 m/s in still water. The speed of the stream is 2 m/s. What distance can the boat travel downstream in 3 hours?

  1. 108 km

  2. 144 km

  3. 150 km

  4. 208 km

  5. None of these
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A Correct answer
Explanation

Downstream speed = boat speed + stream speed = 8 + 2 = 10 m/s. Distance = speed * time = 10 m/s * (3 * 3600 s) = 10 * 10800 = 108000 meters = 108 km.

AI explanation

Using the boat and stream formula, the downstream speed is 8 m/s + 2 m/s = 10 m/s. To find the distance in 3 hours, we first convert the time to seconds, making it 3 * 3600 = 10800 seconds. The distance traveled is 10 m/s multiplied by 10800 seconds, resulting in 108000 meters. Converting this to kilometers gives 108 km.

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