Question 274958
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?
:
This is a pythag problem a^2 + b^2 = c^2
where
a = 30
c = 50
b = dist train is from the crossing
:
30^2 + b^2 = 50^2
b^2 = 50^2 - 30^2
b^2 = 2500 - 900
b = {{{sqrt(1600)}}}
b = 40 meters from the crossing