04 Jun 07
Originally posted by agrysonI do what I can...
Ah, sorry, I was trying not to assume anything about the geometry of the mug, but it was obviously a perfect cylinder. Nice one.
And techinically you dont have to be superintelligent to figure these out. It's just...lateral thinking...thinking sideways. y'know? thinking outside the proverbial box.
A train travels at a constant rate of speed. It reaches a section of track that has 15 poles. It takes the train 10 minutes to go from the first pole to the tenth pole. How long will it take for the train to reach the fifteenth pole?
04 Jun 07
1 edit
Yeah, I love the lateral questions the most because they're real teasers until you get the answer... then you smack your forehead.
As for the question, rate of speed suggests the speed is changing. do you mean 'a constant speed?
If so, it should pass the 15th pole on the 15th minute.
If you mean it's accelerating, I think I need more info...
edit... 14 minutes, because we didn't start from 0?
04 Jun 07
1 edit
Originally posted by agrysonno it's not accelerating. it says in the first sentence its speed is constant. And no it's not 15.
Yeah, I love the lateral questions the most because they're real teasers until you get the answer... then you smack your forehead.
As for the question, rate of speed suggests the speed is changing. do you mean 'a constant speed?
If so, it should pass the 15th pole on the 15th minute.
If you mean it's accelerating, I think I need more info...
edit: meant sentence not paragraph.
04 Jun 07
1 edit
Originally posted by abejnoodexactly. 15 minutes and 32 seconds to be precise, but you got the right idea.
9 in 10 min. So, 1 in 10/9 min. 50/9 min for the 5, so 140/9 minutes. Um, 15.5555 minutes.
Coming at each other in opposite directions, two trains (a freight train and a passenger train) pass each other on exactly parrallel tracks. The freight train travels at 60 miles per hour, whilst the passenger train travels at 30 mph. A passenger observes that it takes 6 seconds to pass the freight train. How many feet long is the freight train?
Remember: there are 5280 ft in a mile.
04 Jun 07
2 edits
Originally posted by agrysonyou got the speed right. but have you ever considered that 90 mph = 1.5 miles per minute?
10,264,320,000ft
Relatively the freight is moving at 90mph,
90x5280 gives feet per hour, then multiply by 60 twice to get feet per second.
Multiply by 6 to get length.
But that's over a million miles long... I've gone wrong somewhere.
And I hate Imperial Measurements... did I mention that?
You dont multiply dimwit. you divide.
90 miles| 5280 ft | 1 hours.| 1 min..| 6 secs
hours....| 1 miles.| 60 mins| 60 secs|
This is what equals the distance of the other train, which is approximately...
eh...lesse here...
792 ft.
or about .15 * 5280.