SOLUTION: A car traveling on a road that is perpendicular to a railroad track. When the car is 30 meters from the crossng, the car's new collision detector warns the driver that there is a t

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Question 267398: A car traveling on a road that is perpendicular to a railroad track. When the car is 30 meters from the crossng, 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 ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A car 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?
:
This is a pythag problem: a^2 + b^2 = b^2
Where:
c = 50,
a = 30
b = dist the train is from the crossing
:
30^2 + b^2 = 50^2
900 + b^2 = 2500
b^2 = 2500 - 900
b^2 = 1600
b = sqrt%281600%29
b = 40 meters, is the train from the crossing