tag:blogger.com,1999:blog-9539359.post113557141918097069..comments2023-10-24T10:06:05.391-05:00Comments on Instructivist: Math puzzleInstructivisthttp://www.blogger.com/profile/01652458042291988959noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-9539359.post-1136865791557283662006-01-09T22:03:00.000-06:002006-01-09T22:03:00.000-06:00Argh... this isn't even a brainteaser...Let r1 be ...Argh... this isn't even a brainteaser...<BR/><BR/>Let r1 be the rate the man drinks water in gallons per day.<BR/><BR/>Let r2 be the rate the wife drinks water in gallons per day.<BR/><BR/>Let B be the capacity of the barrel in gallons.<BR/><BR/>Then r1 x 14 = B<BR/>and (r1 + r2) x 10 = B<BR/><BR/>so<BR/> <BR/> r1 x 4 = r2 x 10<BR/><BR/>or r2 = 0.4 r1<BR/><BR/>Then 0.4 r1 x X = r1 x 14, where X is the number of days it takes the wife to drink the barrel.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1136603640183190382006-01-06T21:14:00.000-06:002006-01-06T21:14:00.000-06:00Old Math:Your math problem. The total time to mak...Old Math:<BR/><BR/>Your math problem. The total time to make a round trip from Denver to Detroit and average 60 mph would be 2d/60 where d is distance between Denver and Detroit. 2d/60 = d/30.<BR/><BR/>The time it takes to go from Denver to Detroit averaging 30 mph is d/30. Thus, the time has been used up to average 60 mph. No matter what speed he goes on the return trip, the time will be greater than d/30, so the average speed will be less than 60 mph.Barry Garelickhttps://www.blogger.com/profile/01281266848110087415noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1136179992981403362006-01-01T23:33:00.000-06:002006-01-01T23:33:00.000-06:00"I don't know about you but I always believe every..."I don't know about you but I always believe everything a car dealer tells me...."<BR/><BR/>Very funny. But in this case they are on to something. The problem appears to be the unavailability of low-sulfur diesel fuel. <BR/><BR/>I found this in a review: <BR/><BR/>Diesel as a solution to air pollution? No, I'm not kidding. Diesels emit much less carbon dioxide than gasoline engines. They do emit more oxides of nitrogen and particulates (soot), but technology similar to the catalytic converters used by gasoline engines is being developed to scrub those pollutants from diesel tailpipes. However, similarly to the manner in which a catalytic converter is destroyed by leaded gasoline, the devices to thoroughly clean diesel exhaust need low-sulfur diesel fuel, which will not be available here until 2007. Modern diesel cars are clean enough for the EPA, but not for the California Air Resources Board, so the Passat TDI (and all other diesel cars) will not be available in California, New York, Massachusetts, Maine, or Vermont until the advent of low-sulfur diesel fuel.Instructivisthttps://www.blogger.com/profile/01652458042291988959noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1136136532433569852006-01-01T11:28:00.000-06:002006-01-01T11:28:00.000-06:00I've been to 4 dealers, looking at Priuses. Each ...I've been to 4 dealers, looking at Priuses. Each one has them on display, and tells me how unusual it is they are in stock, and how no one else has them. None know anything about the US tax credit this year, which would be a tremendous selling point.<BR/><BR/>Sorry that VW is making it so tough for you. It does appear, though, that one way or the other all car manufacturers are going to have to start offering high-mileage vehicles in the very near future.NYC Educatorhttps://www.blogger.com/profile/12188066345722781723noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1136064468287718492005-12-31T15:27:00.000-06:002005-12-31T15:27:00.000-06:00"A car manufacturer supposedly can have only one d..."A car manufacturer supposedly can have only one diesel model in its lineup"<BR/><BR/>I don't know about you but I always believe everything a car dealer tells me....Old Mathhttps://www.blogger.com/profile/12495184085749596145noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1136046873657861072005-12-31T10:34:00.000-06:002005-12-31T10:34:00.000-06:00The Jetta diesel exists but Jetta doesn't come in ...The Jetta diesel exists but Jetta doesn't come in Wagon form. A wagon diesel is what I want.<BR/><BR/>"I guess market forces are strong indeed."<BR/><BR/>The dealers said the alotments they used to get sold quickly. It's not a question of demand. They claim the culprit is government policy. A car manufacturer supposedly can have only one diesel model in its lineup. Morevoer, they say EPA policy allows a lower diesel fuel quality to favor truckers. Consequently, higher grades are not available to help meet stricter emission standards for diesel cars. It's sounds like conspiracy-mongering. I don't know where the truth lies.Instructivisthttps://www.blogger.com/profile/01652458042291988959noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1136040006015296932005-12-31T08:40:00.000-06:002005-12-31T08:40:00.000-06:00I guess market forces are strong indeed. But perh...I guess market forces are strong indeed. But perhaps there is some small hope--<BR/><BR/>I'm told you can get a Jetta diesel in NJ, but for some reason they aren't available in NY. It's easier than a trip to Europe, though.NYC Educatorhttps://www.blogger.com/profile/12188066345722781723noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1135975787180913672005-12-30T14:49:00.000-06:002005-12-30T14:49:00.000-06:00Hola señor educator (un nombre que prefiero no usa...Hola señor educator (un nombre que prefiero no usar).<BR/><BR/>I had my eyes on a VW diesel, specifically the Passat Wagon TDI. Now I find out that that car is no longer available in the U.S. That's a real shame. The vehicle gets terrific mileage.<BR/><BR/>Why this car was discontinued is something of a mystery. The dealers say it has to do with the quality of diesel fuel which makes it hard to meet emission standards. I called VW headquarters and was told the reason is a supposed mismatch between body and engine. All this is weird. In Europe diesels are a high percentage of all new cars. You would think the supposed mismatch would have been worked out by now.<BR/><BR/>It makes me angry that I cannot buy a diesel wagon in this country.Instructivisthttps://www.blogger.com/profile/01652458042291988959noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1135905373550094922005-12-29T19:16:00.000-06:002005-12-29T19:16:00.000-06:00Instructivist,Sorry to go off topic, but how's you...Instructivist,<BR/><BR/>Sorry to go off topic, but how's your car search coming? I've checked out a few hybrids, and the only one that seems worth considering to me is the Prius. With a 3000 tax credit, it ends up costing as much as the Camry.<BR/><BR/>The Accord hybrid is a 6 cylinder, gets only 3 mpg better than the Accord 4 cylinder, and costs maybe 8000 bucks more.<BR/><BR/>Have you found a diesel you could recommend? I'm probably gonna buy a Prius if nothing else jumps out at me soon. It's a very cool car--I drove one today.NYC Educatorhttps://www.blogger.com/profile/12188066345722781723noreply@blogger.comtag:blogger.com,1999:blog-9539359.post-1135720959928282122005-12-27T16:02:00.000-06:002005-12-27T16:02:00.000-06:00A man wants to drive from Denver to Detroit, turn ...A man wants to drive from Denver to Detroit, turn right around and come back. He wishes to average 60 mph for the entire trip. When he gets to Detroit he finds that he has averaged only 30 mph for the first part of the trip. How fast must he drive to make the round trip at the desired 60 mph average?<BR/><BR/>(No offence to Detroit, reverse the role of the two cities for local consumption)Old Mathhttps://www.blogger.com/profile/12495184085749596145noreply@blogger.com