Posted by cornfarmer on August 19, 2008 at 14:47:53 from (12.43.88.120):
OK, I admit it-my math skills need help.If a car gets 25 mpg in the city, and 40 mpg highway, what is the average if driven for 10 miles in the city and 50 miles in the country. Problem is, I come up with two different answers depending on my method. Method 1-weighted average-since 50 is a multiple of 10, I should be able to add 25+40+40+40+40+40=225. Then take 225/6=37.5 mpg. Method 2-fuel consumed. The car uses .4 gallons of gas to go 10 miles at 25mpg, and 1.25 gallons of gas to go 50 miles at 40mpg. So, 1.25+.4=1.65 gallons used. 60 miles divided by 1.65 gallons used=36.36mpg. Question is, which one is correct?
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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