A highway and a train track run parallel to each other. At 5:00 a train crosses a river. Fifteen minutes later, a car, traveling in the same dirrection, crosses the river. The train's average speed is 52mph, the car's is 64mph. When will the car pass the train?(adsbygoogle = window.adsbygoogle || []).push({});

15 minutes = 1/4hour, so train traveling 52mph is 13 miles away from the car over the river.

64 - 52 = The vehicles are converging at a rate of 12mph.

From D = RT, T = D/R. So,

T = 13/12

13/12 = 1 and 1/12th of an hour, or 65 minutes.

The car should pass the train in 01:05, or at 6:05.

This answer is not listed among the choices.

WTF???

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Error in book? Please confirm.

Loading...

Similar Threads - Error book Please | Date |
---|---|

I Euler, De Moivre and a printing error | Thursday at 8:00 AM |

Morris Kline book error? | Mar 2, 2012 |

Validity of proof method - error in book? | Feb 12, 2012 |

Linear Inequalities: Error in book? | Jan 1, 2008 |

Error in book ? | Mar 10, 2007 |

**Physics Forums - The Fusion of Science and Community**