Trent can deliver his newspapers in 30 minutes.It takes Lois 20 minutes to do the same route. How long would it take them to deliver the newspapers if they work together?
MIT 8.286 The Early Universe, Fall 2013 View the complete course: http://ocw.mit.edu/8-286F13 Instructor: Alan Guth In this lecture, the professor first talked about the properties of the universe, then discussed Hubble’s Law, gave an example of isotropy without homogeneity, etc. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
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