The weather bureau reports that a cold front has just passed Austin and is heading toward San Antonio at 42kph. Since you know that Antonio is 126 km from Austin, you first think you have 126/42=3 hours before the front arrives there. However, you realize that triangles and vectors are involved. You find out the following info: Antonio's bearing from Austin is 217 degrees, measured clockwise from north. The cold front lies along a line whose bearing is 63 degrees measured clockwise from north, and its movement is perpendicular to that line.

How long will it REALLY be until the front reaches Antonio?

I have absolutely no clue how to do this. Thanks for all the help!

asked by Kelly

14 years ago

501 views

1

0

Ask a New Question or answer this question.

Question

The weather bureau reports that a cold front has just passed Austin and is heading toward San Antonio at 42kph. Since you know that Antonio is 126 km from Austin, you first think you have 126/42=3 hours before the front arrives there. However, you realize that triangles and vectors are involved. You find out the following info: Antonio's bearing from Austin is 217 degrees, measured clockwise from north. The cold front lies along a line whose bearing is 63 degrees measured clockwise from north, and its movement is perpendicular to that line. 
How long will it REALLY be until the front reaches Antonio?

I have absolutely no clue how to do this. Thanks for all the help!