Homework Help Forum: Trig

Posted by Anonymous on Saturday, October 24, 2009 at 11:58am.

The state highway commission has decided to build a bridge over a dangerous railroad crossing. The approach ramp has to be constructed so that the bridge is 10 meters above the track. If the maximum desired grade of this ramp is 4 degrees, how far back from the edge of the bridge must the ramp start?

• Trig - Vipster, Saturday, October 24, 2009 at 1:21pm

  look at it as a triangle Angle is 4 degree tan of 4 = Side opposite(10m)/ Side adjacent distance required = Side adjacent = 10 / tan 4

  
  

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