lightspeed
Beam me back to Detroit Scotty.
If it is 100 miles one way then it took 2-1/2 hours. An average speed of 80mph would take 2-1/2 hours both ways. So it seems like Mr. Burton is SOL on achieving 80mph average speed.
Google says it is 283 miles.?ÿ Round it to 280 miles and try again.
Took him 7 hours to do 280 miles.?ÿ If he could back in one hour doing 280 miles per hour, the average would be 560 miles in 8 hours or 70 mph.?ÿ So, it's going to need to be a lot faster than that.
Well, even light speed would leave him a millisecond or so too slow.
D/40 + D/x = 2D/80?ÿ?ÿ x -> infinity. He used all his time and has none left for the return trip.
Hey Y'all - It wasn't stated that Mr. Burton took the same route to and fro. ?????ÿ
120
80*2X=40*X+YX
Don't think so.?ÿ Identify your variables and I think you'll see you are not solving the given problem.
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Hey Y'all - It wasn't stated that Mr. Burton took the same route to and fro. ?????ÿ
Touche!?ÿ There are always assumptions to be made with problems from that source. If we don't make that assumption, we cannot find an answer.
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@bill93?ÿ
I think here there was a foregone conclusion rather than an assumption. ?????ÿ
Google says it is 283 miles.?ÿ Round it to 280 miles and try again.
Took him 7 hours to do 280 miles.?ÿ If he could back in one hour doing 280 miles per hour, the average would be 560 miles in 8 hours or 70 mph.?ÿ So, it's going to need to be a lot faster than that.
Actual distance makes no difference, I just used 100 because it is easy. 280 just scales the problem up 2.8 times.
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Fellows.?ÿ Fellows.?ÿ Fellows.?ÿ We are told it took 7 hours to get there.?ÿ If that has a precision of plus or minus one-half hour.?ÿ Then, theoretically, he could have as much as 29 minutes and 59 seconds to make the return trip.?ÿ It would still be an extremely dangerous return trip in a vehicle on highways not designed for such speeds.
Trying to shorten the distance by going in a straight line would be foolish for two reasons.?ÿ The miles saved would not be a significant fraction of the total.?ÿ More importantly, the part going across Lake Michigan would be quite a challenge at any speed.
