document.write( "Question 817574: if a train passes as many telephone poles in two minutes as it goes in km/hr, how far apart are the poles? \n" ); document.write( "

Algebra.Com's Answer #492120 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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if a train passes as many telephone poles in two minutes as it goes in km/hr, how far apart are the poles?
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\n" ); document.write( "Let n = km/hr and no. of tel poles in two min
\n" ); document.write( "Let d = distance between poles (in meters)
\n" ); document.write( "we know 2 min is 1/30 of an hr
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\n" ); document.write( " $\"%281000n%29%2F30\"$ = n(d)
\n" ); document.write( "1000n = 30nd
\n" ); document.write( "divide both sides by 30n
\n" ); document.write( " $\"1000%2F30\"$ = d
\n" ); document.write( "d = 33.33 meters between poles
\n" ); document.write( ":
\n" ); document.write( "see if that works, for example we count 60 poles in two min
\n" ); document.write( "That's a distance of 60 * 33.33 ~ 2000 meters traveled in two min
\n" ); document.write( "In one hour: 30 * 2000 = 60000 meters which is 60 km/hr
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