challenge-1-train.ipynb

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    "# Challenge 1 - Train\n",
    "\n",
    "\n",
    "**Difficulty level**: 0 - beginner\n",
    "\n",
    "**Assumptions**\n",
    "\n",
    "- a 0.1 km long train is going from city A to city B \n",
    "- it is moving at 100 km/h\n",
    "- it needs to cross a 1 km long bridge\n",
    "\n",
    "**Question**\n",
    "\n",
    "how long does it take to fully cross the bridge (from entering the bridge until it is completely off the bridge)."
   ]
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    "train_size = 0.1  # km\n",
    "train_speed  = 100  # km/h\n",
    "bridge_size = 1  # km\n",
    "\n",
    "# time to fully cross the bridge\n",
    "\n",
    "distance = ??????  # the trick point\n",
    "print('Distance:', distance, 'km')\n",
    "print('Speed:', train_speed, 'km/h')\n",
    "\n",
    "# time = distance / speed\n",
    "time = ??????\n",
    "\n",
    "print('Time for fully crossing the bridge:', time, 'h')\n",
    "\n",
    "answer = 0.011000000000000001\n",
    "assert time == answer\n"
   ]
  }
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