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# Re: SQL Fun Challenge #3

From: Daniel Morgan <damorgan_at_x.washington.edu>
Date: Thu, 11 Mar 2004 23:44:40 -0800
Message-ID: <1079077451.572264@yasure>

Gave this one to my students tonight.

There are two solutions ... one easy and one that requires coding a function. Can you find them both?

"Train 1" leaves station A heading east at 10:00am, "Train 2" leaves station B heading west at the same time. The two trains are moving towards each other on the same track and are 114 miles apart.

The trains move at a constant 50 miles per hour. There is a bird perched on "Train 1". The bird begins to fly east as soon as "Train 1" begins to move. The bird flys at a constant 20 miles per hour and flies back and forth between "Train 1" and "Train 2" as the trains approach each other. The bird has perfect recoil (it spends 0 time perched on either train and experiences no acceleration and no deceleration). How many miles does the bird fly before the trains collide?

And since my students got this first: Yes the bird is dimensionless.

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Daniel Morgan