document.write( "Question 348764: a train a mile and a half long takes a minute and a half to go through a tunnel a mile and a half long. how fast is it going? \n" ); document.write( "
Algebra.Com's Answer #249323 by stanbon(75887)\"\" \"About 
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S=2(pi)rh, for h
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\n" ); document.write( "h = S/(2(pi)r)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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