document.write( "Question 138876This question is from textbook
\n" ); document.write( ": A car is traveling on a road that is perpendicular to a railroad track. When the car is 30 meters from the crossing, the car's new collision detector warns the driver that there is a train 50 meteres from the car and heading toward the same crossing. How far is the train from the crossing? \n" ); document.write( "

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A car is traveling on a road that is perpendicular to a railroad track. When the car is 30 meters from the crossing, the car's new collision detector warns the driver that there is a train 50 meteres from the car and heading toward the same crossing. How far is the train from the crossing?
\n" ); document.write( "---------------
\n" ); document.write( "Draw the picture.
\n" ); document.write( "You should have a right triangle with hypotenuse 50 meters
\n" ); document.write( "and a side of 30 meters.
\n" ); document.write( "The other side is the distance of the train from the intersection.
\n" ); document.write( "Call the missing side \"x\".
\n" ); document.write( "EQUATION:
\n" ); document.write( "50^2 = 30^2 + x^2
\n" ); document.write( "x = sqrt[50^2-30^2]
\n" ); document.write( "x = sqrt[2500-900]
\n" ); document.write( "x = sqrt[1600]
\n" ); document.write( "x = 40 meters (the distance the train is from the crossing)
\n" ); document.write( "=============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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