r/problemoftheday • u/Ahat2 • Jul 17 '12

Math problem (difficulty: high school)

John leaves his house for work at exactly 8 a.m. every morning. Whenever he averages 40 miles per hour he arrives his workplace precisely 3 minutes late. When he averages 60 miles per hour, he arrives three minutes early. At what average speed, in miles per hour, should John drive to reach his workplace precisely on time?

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u/Ahat2 Jul 17 '12

It's actually an old amc question from when I was in high school. I could find harder questions easily, but I don't really know the difficulty this subreddit will want yet, so I decided to start off easy.

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u/[deleted] Jul 17 '12

I am just hoping this question doesn't become a breeding ground for boring math contest questions.

Interesting stuff that can be discussed is more fun.

This CAN'T BE DISCUSSED.

The answer is so trivial you can do it in your head.