Hello Vitaliy, > This is the most creative solution so far. :-) thank you. :) > Reminds me of a story I originally heard from a math professor ("On no, h= ere = > we go again!" ;) That's an interesting story, but the instructor would have a better point saying that it was asked to use a barometer, not a = barometer and a rope. With the conventional answer, you use only things present in the = question's enunciation (barometer, building and the one that will = measure and calculate). If you're (really) good doing calculations in = your head you don't even need pen and paper. The student's answers implies the use of objects that the question = don't say he have at his disposal (rope, stopwatch, measuring tape etc). I really like when someone thinks not conventionally. But there's a = (sometimes big) distance from "different" to "usefull". Best regards, Bruque -- = --------------------------------------------------------------------- Edson Brusque Stagetronics Eletro Eletr=F4nicos Ltda Research and Development Blumenau - SC - Brazil http://www.ryan.com.br/netiqueta.htm www.citronics.com.br --------------------------------------------------------------------- -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist