I can only assume that people regard 100 km as a nice base value for trip planning, using a quick mental calculation.
If a trip is between 400 km and 500 km and the car uses 9 L/100 km, then it will consume between 36 L and 45 L on the trip. The advantage is that the trip consumption is of the same order of magnitude as the specified rate of consumption. Neither of the alternatives (0.09 L/km and 90 L/Mm) has quite the same feel. Also, given that highway and trip distances are given in kilometers, people are not used to thinking in megameters. Bill Potts, CMS Roseville, CA http://metric1.org [SI Navigator] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Duncan Bath Sent: Friday, March 29, 2002 17:53 To: U.S. Metric Association Subject: [USMA:19151] RE: Fwd: Re: What is an SI unit? I concur. The problem is, where did the L/100 km come from? Duncan -----Original Message----- From: Joseph B. Reid <[EMAIL PROTECTED]> To: U.S. Metric Association <[EMAIL PROTECTED]> Date: March 29, 2002 17:04 Subject: [USMA:19148] RE: Fwd: Re: What is an SI unit? >Bill Potts wrote in USMA 19131 > >>There's a very common exception -- L/100 km. > > >I would prefer L/Mm. It is 4 characters shorter and in practice would >eliminate a decimal point from the number. > 1 L/Mm = 10 L/100 km > >Joseph B.Reid >17 Glebe Road West >Toronto M5P 1C8 TEL. 416-486-6071 >
