Need help- dimensional analysis  TOPIC_SOLVED

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Need help- dimensional analysis

Postby shergo21 on Mon Sep 03, 2012 5:45 pm

Need in fraction form. Gas sells for 1.2 euros/liter . What is the price in US Dollars per gallon? (1 gal=3.785Liter & exchange rate $ to foreign $1.256 to .7965)
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Re: Need help- dimensional analysis  TOPIC_SOLVED

Postby maggiemagnet on Tue Sep 04, 2012 10:45 pm

shergo21 wrote:Need in fraction form. Gas sells for 1.2 euros/liter . What is the price in US Dollars per gallon? (1 gal=3.785Liter & exchange rate $ to foreign $1.256 to .7965)

It's probably easier to look at the worked examples here than for me to try to explain it. Once you've studied the lesson in the link, then this will make sense: start with (euros)/L, and then use $/(euro) and L/gal to get things set up right. Then cancel and multiply whatever is left.
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