What is an example of a units of measurement practice problem?

1 Answer
Ernest Z.
Aug 25, 2014

Here is an example: A Canadian vacationing in the United States pays $US 3.53/gal for gasoline. What is the equivalent price in Canadian dollars per litre? (1 gal = 3.785 L, and $1 CDN = $ 0.913 US.)

Answer

You must convert US dollars → CDN dollars and gallons → litres.

#("$US "3.53)/(1" gal") × ("$CDN "1)/("$US "0.913) × (1" gal")/(3.785" L")# = $ CDN 1.02/L

Notice how the conversion factors are set up to make the units "gal" and "$US" cancel.

Here's a Socratic example: What is unit conversion?

You can find more practice problems (with answers!) [here]http://www2.franciscan.edu/academic/mathsci/mathscienceintegation/MathScienceIntegation-620.htm#item628

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