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Where The Smoke Blows (Posted on 2003-06-20) Difficulty: 2 of 5
An electric passenger train goes at 73 km/h in the direction of south east. A wind is blowing from the south at 31 km/h.

What is the direction that the smoke from the train is blowing and at what speed?

See The Solution Submitted by Jonny Doe    
Rating: 2.0000 (12 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): Old Smokie | Comment 8 of 22 |
(In reply to re: Old Smokie by anoop)

Perhaps it's more difficult than I thought. I thought that once emitted the smoke would itself have no momentum, but simply become part of the air mass within the prevailing wind, going North at 31 km/h.
The smoke trail across the sky would however remain in a NW/SE line.
The smoke is more like a boat sitting in a cross tide rather than sailing against a tide.
If I'm wrong please explain your thinking.

  Posted by nellie on 2003-06-21 07:29:54

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