Question 124087: 2nd question (and last) that I am helping my daughter with...I can not seem to place enough information into this to solve.
Two joggers were crossing a railroad bridge when they suddenly heard the sound of an approachin train. they were smart enough to run for safety -- but each one ran in the opposite direction. Happily, each jogger reached his perspective end of the bridge in time to avoid the train.
If they wer 2/5 of the way across the bridge when they heard the train and the train was going 50mph and they both ran at the same speed how fast did the two gys run in miles per hour??
So the guy running toward the train gets off and the train then proceeds down the length of the bridge and the other guy gets off. The 2nd guy then has 1/5 left as the train crosses this bridge of unknown length. is it 1/5th of the speed??
Distance is equal to rate/time. Or do I need the speed of sound factored in??
Answer by PBMathandscience(9)   (Show Source):
| |
|
