SOLUTION: 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

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 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      Log On


   



Question 161283: 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 meters from the car and heading toward the same crossing. How far is the train from the crossing?
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
This is a classic 3-4-5 triangle. ONe leg is 30, the hypotenuse is 50. So the other leg must be 40.
50%5E2+=+30%5E2+%2B+x%5E2
2500+-+900+=+x%5E2
1600+=+x%5E2
40+=+x