#### 77.14### 高等045：计算题

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• Total distance = 180 + 90 = 270 km.
• Total time = 2 + 1.5 = 3.5 hours.
• Average speed = 270 / 3.5 ≈ 77.14 km/h.
• 如果一个机器人在仓库中搬运箱子，每次携带3个箱子，需要搬运一定数量的箱子总共15次。在完成任务后，它返回起点，行驶总距离为900米。问机器人单程的速度（单位：米/秒）是多少？（假设机器人速度恒定）
• 每次搬运3个箱子，总共进行15次搬运，
• \times 15 = 45 \text{ 个箱子（用以确认，无需直接计算）}

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