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Technology PoW: Train Trouble
Go to: http://mathforum.org/tpow/index2.ehtml?puzzle=226 (opens a new window)
Description:

How fast is the train moving to allow Herman and Sheila to each escape the tunnel?

Students are invited to use the link "Submit your answer" to share their solutions, and then "self-mentor" using specially designed hints, checks, and suggestions for extensions.

Technology Type: Java Applet 
Author: Claire Mead
Language: English 
Cost: Does not require payment for use

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Courses: Math 7 Fractions, Distance-rate-time