Mr. Smith is normally picked up at the train station at 5 o\'clock. His driver s

Question

Mr. Smith is normally picked up at the train station at 5 o'clock. His driver starts from home appropriately so he arrives exactly on time. One day Mr. Smith arrived to the train station early at 4 o'clock. Instead of waiting around, he decided to walk home and meet the driver along the way (the driver keeps the same schedule). Mr. Smith arrived home 20 minutes earlier than he normally would. On another day, Mr. Smith arrived early at 4:30 and again decided to walk home and meet the driver along the way. How much earlier than normal did he arrive at home? Mr. Smith is normally picked up at the train station at 5 o'clock. His driver starts from home appropriately so he arrives exactly on time. One day Mr. Smith arrived to the train station early at 4 o'clock. Instead of waiting around, he decided to walk home and meet the driver along the way (the driver keeps the same schedule). Mr. Smith arrived home 20 minutes earlier than he normally would. On another day, Mr. Smith arrived early at 4:30 and again decided to walk home and meet the driver along the way. How much earlier than normal did he arrive at home?

Explanation / Answer

For 60 min earlier arrival Mr Smith reached home: 20 mins earlier
Therefore,
For 1 min earlier arrival Mr Smith reached home: 20/60 mins earlier
So,
For 30 min earlier arrival Mr Smith reached home: (20/60) *30 = 10 mins earlier Answer

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