On Monday 10 August 2009 12:34:52 Simon_Meng wrote: > So how did 120 km/h become 119 km/h in the article? It seems Anne Huang, > author of the article must have converted the 120 km to 74.56 miles, > rounded it to 74 miles and the reconverted it back and rounded it to 119 > km.
There are two ways to round 74.56 to 74, neither of which makes sense: Either you round down, which makes sense only with one-way tolerances, or you round to the nearest even number, which implies a ruler or scale marked in twos. There are measuring tapes marked in two-millimeter intervals, but rounding a calculated value like this is unusual. Whether rounded to the nearest 1, 5, or 25, 74.56 becomes 75. Rounding to the nearest 10 yields 70. Pierre
