How Hot Is That?

 The Problem:

 Which is hotter a blistering 43C in the Arizona desert or a dazzling 110F in Kos?


You can convert from Centigrade to Fahrenheit temperatures using the exact, but awkward, formula      or the quick, but approximate, formula F = 2C + 30

What we want to know is: 

1          Does the quick formulae ever give exactly the right answer?

2          For what range of Centigrade temperatures does the quick formula give an answer thats within 5F of the correct value?

3          Is the quick formula good enough for our British climate?


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Last modified: June 18, 2007